C# Object Oriented Software

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Browse free open source C# Object Oriented Software and projects below. Use the toggles on the left to filter open source C# Object Oriented Software by OS, license, language, programming language, and project status.

  • Paessler - Monitor Your Whole Network in Minutes Icon
    Paessler - Monitor Your Whole Network in Minutes

    Auto-discovery finds your devices and deploys pre-configured sensors instantly. No project plan required, just visibility from day one.

    Waiting weeks for a monitoring rollout isn't an option when infrastructure doesn't stop running. PRTG's auto-discovery scans your network and suggests from over 200 pre-configured sensor types, so you're watching servers, applications and devices within minutes, not after a multi-week deployment. Enterprise-strength monitoring, without the enterprise complexity. Start your free trial today.
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  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
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  • 1
    SMC - The State Machine Compiler

    SMC - The State Machine Compiler

    Translates state machine into a target programming language.

    SMC takes a state machine stored in a .sm file and generates a State pattern in 14 programming languages. Includes: default transitions, transition args, transition guards, push/pop transitions and Entry/Exit actions. See User Manual for more info.
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    5.0 out of 5 stars 11 Reviews
    Downloads: 35 This Week
    Last Update:
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  • 2
    STD Foundation Classes

    STD Foundation Classes

    Object oriented frameworks - PowerBuilder, PowerServer & InfoMaker!

    by Chris Pollach (http://chrispollach.blogspot.ca) A fully integrated "object oriented" set of PB Classes for the following products: PowerBuilder, PowerClient & PowerServer. The framework greatly enhances the development process by making the PowerBuilder developer significantly more productive! License: https://sourceforge.net/projects/stdfndclass/files/License (Open Source) => Updated version of the STD "Integrated" framework 2026R1 build 2026.1.0.467 was released to production on 2026-01-09. https://sourceforge.net/projects/stdfndclass/files/FrameWork/Integrated => The STD Framework "Example Apps" 2026 R1 latest builds https://chrispollach.blogspot.com/2026/03/updated.html => Updated version of the STD "Order Entry" example App 2025R2 build 2026.1.0.647 was released on 2026-04-08. https://sourceforge.net/projects/stdfndclass/files/Applications/PowerBuilder/OrderEntry
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    5.0 out of 5 stars 1 Review
    Downloads: 52 This Week
    Last Update:
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  • 3
    db4o is the world's leading open source object database for Java and .NET. Leverage fast native object persistence, ACID transactions, query-by-example, S.O.D.A object query API, automatic class schema evolution, small size (http://developer.db4o.com)
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    5.0 out of 5 stars 3 Reviews
    Downloads: 14 This Week
    Last Update:
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  • 4
    Outdated: New version can be found here...https://github.com/bernharde/hexbox Be.HexEditor is a small, fast and simple hex editor. It contains a reusable hex edit control called HexBox. This C# control is reusable for every .NET Framework application.
    5.0 out of 5 stars 11 Reviews
    Downloads: 8 This Week
    Last Update:
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  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
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  • 5
    Castle aspires to simplify the development of enterprise and web applications. Offering a set of tools (working together or indepedently) and integration with other open source projects, Castle helps you get more done with less code.
    5.0 out of 5 stars 22 Reviews
    Downloads: 1 This Week
    Last Update:
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  • 6

    Simple Renamer v1.2

    C#.NET 5.0 File Renamer

    This is a simple program to rename a large number of files like images, rather than one at a time. Please let me know of any bugs you find or improvements you may think would help.
    Downloads: 2 This Week
    Last Update:
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  • 7

    ClassStudio

    A code generator. Compile C# code from and to different languages.

    Downloads: 1 This Week
    Last Update:
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  • 8
    A framework that provides AJAX technologies for web pages created with ASP.NET. It allows developers to easily integrate AJAX support into their pages without replacing the ASP.NET controls and/or writing javascript code.
    Downloads: 1 This Week
    Last Update:
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  • 9
    This is a calendar control with multi-select. It provides a point and click interface for selecting holidays or special days. It previously extended on MonthCalendar, now it has a fixed size in all regions and all drawing is handled internally.
    Downloads: 0 This Week
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  • Host LLMs in Production With On-Demand GPUs Icon
    Host LLMs in Production With On-Demand GPUs

    NVIDIA L4 GPUs. 5-second cold starts. Scale to zero when idle.

    Deploy your model, get an endpoint, pay only for compute time. No GPU provisioning or infrastructure management required.
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  • 10
    NDO® (.NET Data Objects®) is a powerful tool for object relational mapping (O/R-Mapping) on the Microsoft® .NET Platform. It integrates smoothly in Visual Studio, using an Add-in. The latest version 3.0 works with .NET 4.0/4.5/4.5.1 and Visual Studio 2010/2012/2013/2015. Download and issue tracking has been moved to the NDO Website.
    Downloads: 0 This Week
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  • 11
    A time schedule graphical component with a point and click interface. This is a custom drawn control written in C#. It provides an easy interface for laying out periods of time associated with a predefined color/state. The control respects local timeform
    Downloads: 0 This Week
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  • 12
    The ADL Resource Libraries provide an open-source, standards-based set of APIs, tools, and services as a “starter kit” to anyone who is interested in building software that is SCORM 2004 3rd Edition conformant and leverages other established and emerging ADL technology.
    Downloads: 0 This Week
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  • 13
    AODL,a C# .net library for creating / editing documents in the OpenDocument Format ( ODF ). Requires no knowledge about the ODF XML schema itself. AODC, an OpenDocument Converter & Embed OpenOffice as .net Control
    5.0 out of 5 stars 1 Review
    Downloads: 0 This Week
    Last Update:
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  • 14
    A main aim of this project is to deliver an infrastructure for HL-7 v3 compilant messages exchange. This infrastructure should be based on existing real time queueing system such as Apache ActiveMQ. A product of this project does not include user interfa
    Downloads: 0 This Week
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  • 15
    Class library to provide algorithmic functionality to collections. Some of the algorithms are: ForEach, Find, FindAll, Collect, etc.
    Downloads: 0 This Week
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  • 16
    2d shooter game
    Downloads: 0 This Week
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  • 17
    A .Net library coded in C# language that inplements some sort of functions I found useful.
    Downloads: 0 This Week
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  • 18
    Amber.net is a lightweight R/O mapper framework for .net, which easy database access without XML descriptors. It uses reflection and annotations for the CRUD cycle of c# objects. Amber.net is dot net version of original java version of Amber
    Downloads: 0 This Week
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  • 19
    With this program, you can create app settings file ( *.ini). This program is written by C#. It has syntax highlighting and new, open, save, save as, add comment, add section, add key and value commands for now.
    Downloads: 0 This Week
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  • 20
    AsyncControls is a total rewrite of the ASP.NET from the ground-up. It provides 30+ Ajax-Enabled ASP.NET server controls. Everything about AJAX is handled from the client-side to the server. No javascript, ever! Includes Ajax PageRepeater and Calendar.
    Downloads: 0 This Week
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  • 21
    The Autonomous is a powerful framework to make autonomous class tests. With it you can make the autonomous objects with your operations, specify one behavior then start the process. The tests will be executed in linear, circular or aleatory way. Enjoy!
    Downloads: 0 This Week
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  • 22
    BITXml is an open xml based protocol for Machine to Machine communications. BITXml is both language and "transport" agnostic and covers all the requirements of a generic M2M telemetry & control application. For more info www.bitxml.org
    Downloads: 0 This Week
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  • 23
    Object Relational Model (ORM) that's simple to implement.
    Downloads: 0 This Week
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  • 24
    Sort, filter and aggregate lists of business objects without all the boring code! This library provides a powerful "view" approach to data binding .NET objects to user interface controls.
    5.0 out of 5 stars 4 Reviews
    Downloads: 0 This Week
    Last Update:
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  • 25
    BizBlox is a simple to use Object Relational Mapper API for .Net. On top of the usual features you expect from an ORM it provides native support for web services using transfer objects and partial transfer objects.
    Downloads: 0 This Week
    Last Update:
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