Page 4 | Best Free Engineering Software of 2026

RWIND

Dlubal Software

The wind simulation program RWIND, like the other Dlubal Software programs, is easy to use and reliably provides the required result. If using RWIND, the wind will certainly not be taken out of the sails of your project. RWIND allows you to analyze wind flows (digital wind tunnel) around buildings or any other objects. For this, RWIND uses a CFD simulation (Computational Fluid Dynamics) and shows you how the wind flows affect the generated structures. Run a wind simulation for simple or complex structures – the result will always speak for itself. You can then simply import the wind loads calculated with RWIND into RFEM or RSTAB.

Starting Price: €2,950 one-time payment

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MyArchitectAI

MyArchitectAI is an AI-powered rendering tool that enables architects and interior designers to produce photorealistic images in under 10 seconds directly from their browser, eliminating the need for installations or expensive hardware. Compatible with major CAD and 3D modeling software, it supports JPG and PNG uploads, preserving the original geometry, colors, and materials of designs. Users can customize renders by describing desired outcomes or selecting from over 80 predefined architectural styles, materials, and landscapes. The AI engine manages modeling, lighting, and texturing, delivering 4K resolution images ready for client presentations or further editing. Additionally, the style transfer feature allows experimentation with various design aesthetics by blending reference images with original designs while maintaining the initial geometry. This accelerates the conceptualization process, aiding clients in comprehending design visions early on.

Starting Price: $29/month

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Cableizer

Braavos GmbH

Cableizer is a software package for the electrical, mechanical, and thermal design of cable systems. Cableizer is completely web-based: it's inexpensive, widely available, easily customizable, has improved interoperability, and is easier to install and maintain than a desktop application. Properties * Software-based design of cables up to 500 kV! * Cable calculations including mass, heat of combustion, CO2, price, etc. * Calculations of rated current and cable pulls * Environmental calculations including magnetic fields and increase in ground temperature * Web-based without installation or dongle, but with automatic updates * Collaborate with share links directly with customer

Starting Price: 333 EUR/month

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RealityMAX

Atomic Pixels

The 3D design collaboration platform to boost your design workflows. Invite your teammates to collaborate in real-time, build, compose and present in a whole new way. Start building 3D projects together, faster. Stop struggling with different desktop design software and tools at every stage of the process, sending massive files back and forth, and wasting endless hours exporting assets. RealityMAX technology makes all this a thing of the past. Create scenes with multiple 3D models. All major 3D file formats are supported. Share the same 3D workspace, at the same time, working remotely. Get your content out in the world as Web 3D or AR experiences, or insert it on your web page. Invite people to your virtual 3D workspace with just one link. Bring your teammates together from anywhere using the same collaboration software. See changes and updates as they are made, from any device.

Starting Price: $40/mo

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4Reality

4Reality Studio

4Reality is a versatile real-time rendering software designed to deliver photorealistic visualizations and simulations. It supports CAD and 3D model imports, offering advanced features like Lumen and Pathtracing technologies, dynamic sky simulation, and real-time VFX. Equipped with libraries of materials and models, 4Reality streamlines design processes for professionals in architecture, engineering, and product design. The software supports real-time DEM and CFD simulations, VR headset compatibility, point cloud imports, and advanced material creation. Additional tools include dynamic scene control, saved camera views, interactive annotations, and rendering without resolution limits. Available in French and English, 4Reality transforms 3D models into lifelike experiences.

Starting Price: Free

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PoligonSoft

Professional tools for modeling and optimizing metal casting processes with the ability to predict the formation of defects in cast parts. - Filling Dynamics - Macro and Microporosity - Residual Stresses - Deformations and Warping - Cracks (Hot and Cold) - Hydrostatic Pressure - Mold Wear - Slag Formation PoligonSoft provides reliable simulations that prevent waste and costly redesigns, allowing manufacturers to "get it right" the first time. The core of PoligonSoft includes three calculation systems: hydrodynamic, thermal, and stress. Along with a set of additional options, it allows the simulation of all traditional casting technologies and many special processes. At PoligonSoft, all stages of the casting production process can be sequentially simulated: mold heating, mold filling with molten mass, solidification on the bench or in the thermostat, extraction of the cast part from the mold, cutting of the feeding system and risers, etc.

Starting Price: $14,137 USD/year

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Avoyd

enkisoftware

Avoyd Voxel Editor and Renderer Create, import, export and render large voxel worlds. 3D art and rendering tool for voxel artists, map builders and game developers. Main Features: - Large scenes up to 256k voxels a side. - CPU and GPU path traced rendering. - Export to optimised mesh glTF and OBJ with physically-based materials parameters, and VOX. - Import MagicaVoxel VOX, Minecraft maps, heightmaps, palettes. - Orthographic projection with Isometric presets. - Up to 65k physically based materials. - Physically based light and atmosphere

Starting Price: €15 one-time payment

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RSECTION

Dlubal Software

Do you often spend too long calculating cross-sections? Dlubal Software and the RSECTION stand-alone program facilitate your work by determining section properties of various cross-sections and performing a subsequent stress analysis. With the stand-alone program RSECTION, Dlubal Software provides you with a time-saving solution for the calculation of thin-walled and massive cross-sections. The program determines the section properties and performs a stress analysis. The seamless integration with the FEA software RFEM and the structural frame & truss analysis software RSTAB allows for efficient cooperation. RSECTION cross-sections are available in the RFEM and RSTAB libraries, and you can easily import the internal forces in the programs.

Starting Price: €292.50 rent 1 month

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RSTAB

Dlubal Software

RSTAB is a powerful analysis and design software for 3D beam, frame, or truss structure calculations, reflecting the current state of the art and helping structural engineers meet requirements in modern civil engineering. Use the successful structural frame & truss analysis software RSTAB for your design of beam, frame, or truss structures consisting of steel, reinforced concrete, timber, aluminum, or other materials. With RSTAB, you can easily and quickly define a structural model and then calculate the internal forces, deformations, and support reactions. There are design add-ons at your side that you can use to consider the material- and standard-specific requirements.

Starting Price: €487.50 rent 1 month

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RunMat

RunMat (by Dystr) is a fast, free, open-source alternative for running MATLAB code. Users can run their existing .m files with complete MATLAB language grammar and core semantics. No license fees, no lock-in. 300+ built-in functions supported. RunMat is built with a modern Rust runtime featuring a tiered execution model: an interpreter (Ignition) for instant 5ms startup and a JIT compiler (Turbine/Cranelift) for hot paths. GPU acceleration is automatic via a fusion engine that detects elementwise operation chains and dispatches them as optimized GPU kernels across NVIDIA, AMD, Apple Silicon, and Intel GPUs through Metal, DirectX 12, Vulkan, and WebGPU. Up to 131x faster than NumPy and 7x faster than PyTorch on dense numerical workloads. Runs everywhere: CLI, NPM package, Homebrew, Jupyter kernel, or instantly in the browser via WebAssembly + WebGPU. Single portable binary. MIT licensed.

Starting Price: $0

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OwlCAD

Spare Matter Corp

OwlCAD is parametric 3D CAD that runs in your browser, built for designing parts to 3D print. It sits between beginner tools people outgrow and professional CAD that needs an install and a learning curve. Every dimension stays editable: change a value and the model rebuilds. Booleans are manifold by construction, clearance presets size press, slip and loose fits for FDM, and a printability check flags overhangs, thin walls and leaks before export. Includes constrained sketches, per-edge fillets and chamfers, patterns, sweep and loft, assemblies with mates and a bill of materials, and 30+ generators for gears, threads, enclosures, Gridfinity bins and hinges. Imports STL, 3MF, OBJ, STEP and OpenSCAD; exports STL, 3MF, OBJ, GLB, STEP, DXF and SVG. AI generation turns a prompt into an editable model or a sculpted mesh. Also available as a desktop app and an MCP server for AI agents. Nothing to install, no account needed to start.

Starting Price: $12.00/month

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ProtoFlow

ProtoFlow is an AI-native desktop electronic design automation (EDA) tool for schematic capture and PCB design. Describe a circuit in plain language to create an editable first draft, search real electronic parts and footprints, inspect datasheets, clean up wiring, and continue manually in familiar schematic and board editors. ProtoFlow supports ERC/DRC review, 3D board inspection, Git-backed versioning and visual diffs, comments and collaboration, plus manufacturing outputs including Gerber, drill, BOM, and placement files. Designs remain normal editable geometry, and users should verify symbols, footprints, connections, and manufacturing data before production. ProtoFlow can read and write native KiCad files and export to established EDA workflows. A free plan is available without a credit card, with paid options for higher AI usage. It is built for hardware engineers, makers, students, educators, researchers, and electronics startups.

Starting Price: Free

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Vizbase

Vizbase is an AI rendering platform for architects, interior designers and design studios. Upload a view from SketchUp, Revit, Rhino or Blender, or a hand sketch. Vizbase detects the walls, floors, joinery, furniture and fixtures in the scene and lets you set materials element by element: in plain language, from a reference photo, or from a library of more than 2,000 materials. It then returns a photorealistic render that follows your design. Four render modes cover different jobs, from Gen 2.0, closest to the source image, to Gen 4.0, with photographic light and materials. Refine changes a marked area of a finished render, Multiview carries an approved look across camera angles, and exports go up to 8K. The native SketchUp plugin (SketchUp 2021+, Windows and macOS) renders straight from the model. Vizbase runs in the browser, so no render engine or GPU is needed. Renders come with full commercial rights. Free plan: 5 credits, no credit card.

Starting Price: €29/month

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3DGEN

3DGEN is a set of parametric generators that run entirely in the browser and turn ideas into print-ready 3D models without CAD. Upload an STL and get a printable two-part box mold, a reusable silicone mold box or a plaster slip-casting mold; or start from an image, text or a photo to make cookie and clay cutters, stamps, texture rollers, nameplates, keychains, lithophanes, suncatchers, vase and planter molds, casting trays, pet bowls and bowl stands. Every generator has a live 3D preview and sliders for size, walls and details, and exports STL or 3MF ready for the slicer. Files are processed locally in the browser and are not uploaded to a server. Freemium: the free plan covers personal use; Pro adds unlimited downloads, a commercial license and your own logo instead of the 3DGEN mark.

Starting Price: $20/month

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Tutelia

Tutelia is a browser-based floor-planning application for creating measured 2D layouts and exploring them in 3D. Users can draw walls by entering dimensions or trace an existing JPG, PNG or SVG plan, then add rooms, doors, windows, furniture, lighting, floor and wall finishes, balconies, gardens, pools, stairs, multiple levels and basements. The plan can be viewed from above, in section, or as a first-person walkthrough, including day and evening views. Projects can be shared through a browser link so recipients can view the plan and 3D walkthrough without installing an app or creating an account. Users can also export a scaled A4 PDF or image and a floor-area sheet. Tutelia is intended for property professionals, interior designers, renovation businesses, retail and office planners, and homeowners who need to visualize a space or communicate a proposed layout.

Starting Price: €15/month

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PartGrid

Partgrid.ai

PartGrid is a web-based spare-parts catalog platform for manufacturers, OEMs, distributors, dealer networks, and aftermarket e-commerce teams. It converts exploded-view diagrams, technical drawings, PDFs, and structured parts lists into searchable interactive catalogs. AI-assisted detection links diagram callouts to part records, with review and correction tools for exceptions. Teams can organize parts into categories and collections, maintain replacements and pricing, and publish branded catalogs as embeds in websites or portals. The customer-facing viewer supports visual lookup and can route selected parts to quote or cart workflows. Catalog localization, currencies, dealer access, and documented integrations help fit the experience into existing service and commerce operations.

Starting Price: €99/month

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CADProps

CadProps Technologies Pte. Ltd.

CADProps is a browser-based CAD viewer and measurement workspace for engineers, manufacturing and purchasing staff, designers, and other users who need to inspect parts without installing desktop CAD software. It opens supported STEP, IGES, STL, OBJ, 3MF, DWG/DXF and selected native CAD files, with capabilities that vary by format and geometry. Users can inspect assemblies, measure dimensions and geometry, calculate surface area and volume, estimate mass using a selected material density, compare models, process batches, and export property data. Viewing and measuring are available without an account; signing in is required to convert files, save them across devices, or create share links. The web workspace also supports temporary guest sessions and shareable model reviews. It covers 92 extensions. Native CAD formats are processed on CADProps servers. Ethan Tan, CTO.

Starting Price: Free

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FPVtune

FPVtune is a browser-based Betaflight tuning and flight-log analysis tool for FPV drone pilots. Users provide Betaflight blackbox flight logs and a CLI configuration dump; the service analyzes gyro noise, resonance, step response and motor data, then returns recommended PID, filter and feedforward settings as Betaflight CLI commands. It supports Betaflight 4.5 and later. Additional tools analyze crash logs for possible causes such as ESC desynchronization, power loss, failsafe events, gyro overflow and mechanical failures, and inspect motor imbalance, vibration and saturation. A flight-time calculator estimates flight time from battery capacity and current draw. The product is intended for pilots who want help interpreting flight data and applying tuning changes in Betaflight Configurator.

Starting Price: $19.95/month

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Nasjicad

UPREPS

Nasjicad is a 2D computer-aided design (CAD) application for creating and editing technical drawings in a browser or as desktop software for Windows, macOS and Linux. It provides line, polyline, arc, circle, spline, hatch, dimension, text, layer, snap and block tools, plus editing and plotting functions. It opens and saves DWG and DXF drawings and offers PDF, image and drawing-conversion tools. Optional AI features can create or revise editable 2D geometry, trace PDF pages and images, generate takeoff tables, apply office standards and prepare sheet sets. The software supports drafting tasks such as floor plans, sections and mechanical details. Manual drafting is free and requires no account; optional AI and whole-drawing services use monthly plans, credits or a limited free monthly allowance.

Starting Price: $5/month

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fabPlane

TensorFleet

fabPlane is a desktop electronic design automation (EDA) workspace for creating and editing printed circuit boards with an AI agent. It bundles KiCad and works directly with existing KiCad project files, so users can open and continue working on .kicad_pro projects without importing or converting them. Designers can describe a board's purpose, sketch connections, or provide a reference, then use typed tools and review each proposed change as a diff before accepting or discarding it. After acceptance, fabPlane runs the autorouter and design-rule checks. The workflow also includes manufacturing checks, output generation, bills of materials, and purchase carts for supported fabrication houses and component distributors. fabPlane is free to download, with desktop builds for macOS, Windows, and Linux. It serves electronics and PCB designers, KiCad users, hardware teams, and open-hardware makers.

Starting Price: $0

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ZapSketch

ZapSketch is a browser-based electrical home-run planning tool for electricians, electrical contractors, and estimators. Users can import a floor-plan PDF, sketch walls on a blank sheet, or work from a quick drawing, then place panels, junction boxes, and devices and route circuits and raceways. The application measures run lengths and provides preliminary conductor-sizing, ampacity, voltage-drop, and conduit-fill feedback as the layout changes, using documented NEC 2023 calculation assumptions. Users can review circuit schedules and export marked-up plan PDFs and raceway pull schedules for estimating, review, and field handoff; some export details and unwatermarked reports require Pro. Free standalone voltage-drop, wire-size, and conduit-fill calculators are also available. ZapSketch is a preliminary planning aid, not a replacement for adopted-code review, engineering judgment, or verification of project conditions.

Starting Price: $19/month

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ProWave COMTRADE Viewer

Prelta Systems

ProWave is a Windows desktop application for viewing and analyzing COMTRADE fault and disturbance records from protection relays and digital fault recorders. It reads IEEE C37.111 records from 1999 and 2013 in ASCII and binary formats, letting engineers review records from different relay manufacturers in one workspace. Users can open records in multiple tabs, align channels and timing, and view analog current, analog voltage, and digital signals in separate plot panels. T0, T1, and T2 markers show waveform positions and signal values. Phasor and harmonic views display RMS, total harmonic distortion, and phase angle measurements at cursor positions. A file browser filters for COMTRADE configuration files. The free edition is for individual use; a separately licensed OEM/enterprise edition supports company deployment or commercial redistribution. ProWave requires Windows 11 or later and at least 16 GB RAM.

Starting Price: $0

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NestMaxx

EXASTELLAR INDUSTRIES

NestMaxx is a browser-based 2D true-shape nesting tool for preparing parts for laser, plasma, waterjet and CNC router cutting. It arranges parts on one or more sheets using their outlines, supports part-in-part placement, rotation and grain controls, and lets users add quantities, priorities and arrays. Parts can be imported from DXF or SVG, created in a built-in drafting editor, or selected from a library of more than 40 parametric shapes. Users can set sheet dimensions and spacing, adjust layouts manually, and export each sheet as DXF or SVG for use in separate CAD/CAM or machine software. NestMaxx runs in the browser on the user's device and is offered free without an account or installation. It is intended for fabricators and shops working with sheet metal, wood panels and other flat materials.

Starting Price: Free

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IrriPlanner

IrriPlanner Kft.

IrriPlanner is a browser-based irrigation design application for irrigation contractors, landscape designers and homeowners. Users can trace a property to scale, start with a satellite image, CamToPlan scan or imported PDF, and place sprinkler heads manually or automatically. The software groups heads into zones using measured pressure and flow, routes pipework, and checks coverage, pressure, valve limits and connections during editing. It produces a PDF plan and report, bill of materials, and client quotation. Its catalog includes products from multiple sprinkler manufacturers, and users can add custom types. A free plan supports up to two projects and PDF export; paid plans add unlimited projects and further reporting and quotation features. IrriPlanner runs in a web browser and is optimized for desktop use.

Starting Price: $0

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HydroCAD

HydroCAD Software Solutions

HydroCAD Stormwater Modeling provides easy TR-20, TR-55, SBUH, and Rational hydrology, plus TC calculations, pond storage, outlet hydraulics, pump routing, underground storage, pollutant loading, and more. Special features include direct CAD import, dam breach routing, skimmers, tubes, siphons, local rainfall data import, and a constantly expanding chamber library. Interactive graphical environment is fast and intuitive, producing better results in less time on every project.

Starting Price: $295.00

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RETScreen

RETScreen International

The RETScreen® Clean Energy Management Software platform enables low-carbon planning, implementation, monitoring and reporting. RETScreen Expert, an advanced premium version of the software, is available in Viewer mode completely free-of-charge. We collaborate with government and multilateral organizations to co-fund and develop advanced versions of the RETScreen® Clean Energy Management Software platform. RETScreen Expert, the intelligent version of the software, incorporates benchmark, feasibility, performance and portfolio analysis for various types of facilities, including commercial, institutional, residential, industrial and power generation, all within one comprehensive platform. The focus of our innovation lab is to ensure that the RETScreen software is always at the leading edge of the clean energy technology transition, and that we continuously improve our platform to meet the complex needs of our large and rapidly growing global user community.

Starting Price: $869 per year

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Simcad Pro

CreateASoft, Inc.

Simcad Pro lets you visualize, analyze and optimize process flow systems in an interactive 2D/3D simulation modeling environment. Plan, optimize, and re-arrange processes and procedures while optimizing layouts, facility improvement, automation and scheduling. Simcad Pro integrates live and historical data to provide the most effective simulation tool on the market. Applications in multiple industries including manufacturing, automation, logistics, distribution warehouse, food and beverage, services, and more. Multi-Threaded - 64 bit Engine. On-the-fly simulation - Make real-time changes to the model while the simulation is running. Animate the model in 2D, 3D and VR with Ray Tracing, light effect, and shadows. Singular model building environment. Smart, Spatially Aware Agents, Sub-Flows, Collision Avoidance and Real-Time Connectivity. Spaghetti Diagrams, Congestion Analysis, Heat Maps, Efficiency and OEE. Extensive reporting and analysis tools. Scenario Analyzer.

Starting Price: $4950.00/one-time/user

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AirData

AEROsoft Systems

AEROsoft Systems, Inc. has been serving the aviation industry for over 25 years. We design, develop and market software that makes your company easier to manage and more productive. Our main product called AirData is a procurement and inventory management application written specifically for companies in the Aviation and Aerospace industries. AirData provides aviation supply companies and distributors with a single, integrated inventory and customer management system. We also offer custom database design, database programming and data conversion services. AirData Version 4.0 is an Inventory Management System written specifically for aviation and aerospace distributors, suppliers and brokers. It provides the special tools required to run your aviation business such as creating, printing and viewing: Purchase Orders, Invoices, Repair Orders, Customer & Vendor Quotations, Reports, Inventory Control, Material Certifications and Control Tags.

Starting Price: $1995 one-time payment

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Predator CNC Editor

Predator Software

The Predator CNC Editor is the most popular CNC code editor available on the market. It includes hundreds of features to improve the day to day productivity of CNC machine tools, operators and CNC programmers, yet it is extremely easy to use. The Predator CNC Editor is the ideal choice for the small job shop or the largest manufacturer.

Starting Price: $250

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AxisVM

InterCAD

The primary applications of AxisVM are in the design of buildings, and industrial and geotechnical structures. Due to its powerful finite element solver and practical modeling tools, it has also been used in bridge design, and in the design of composite structures, machines, and vehicles. Besides the basic configurations, optional design modules are available for structures made of reinforced concrete, steel, timber, and masonry members and connections. In addition, thanks to the special elements and analysis capabilities, users have successfully applied AxisVM to the design of innovative and custom structures. Reports can be created based on tables, drawings, and detailed design calculations with additional headings and text lines. Reports are auto-updating, i.e. generated based on the most current model data and results.

Starting Price: $500 one-time payment

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Best Free Engineering Software - Page 4

Compare the Top Free Engineering Software as of November 2026 - Page 4

RWIND

MyArchitectAI

Cableizer

RealityMAX

4Reality

PoligonSoft

Avoyd

RSECTION

RSTAB

RunMat

OwlCAD

ProtoFlow

Vizbase

3DGEN

Tutelia

PartGrid

CADProps

FPVtune

Nasjicad

fabPlane

ZapSketch

ProWave COMTRADE Viewer

NestMaxx

IrriPlanner

HydroCAD

RETScreen

Simcad Pro

AirData

Predator CNC Editor

AxisVM

Best Free Engineering Software - Page 4

Compare the Top Free Engineering Software as of November 2026 - Page 4

RWIND

MyArchitectAI

Cableizer

RealityMAX

4Reality

PoligonSoft

Avoyd

RSECTION

RSTAB

RunMat

OwlCAD

ProtoFlow

Vizbase

3DGEN

Tutelia

PartGrid

CADProps

FPVtune

Nasjicad

fabPlane

ZapSketch

ProWave COMTRADE Viewer

NestMaxx

IrriPlanner

HydroCAD

RETScreen

Simcad Pro

AirData

Predator CNC Editor

AxisVM

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