Showing 551 open source projects for "core java"

View related business solutions
  • Powerful App Monitoring Without Surprise Bills Icon
    Powerful App Monitoring Without Surprise Bills

    AppSignal starts at $23/month with all features included. No overages, no hidden fees. 30-day free trial.

    Tired of monitoring tools that punish you for scaling? AppSignal offers transparent, predictable pricing with every feature unlocked on every plan. Track errors, monitor performance, detect anomalies, and manage logs across Ruby, Python, Node.js, and more. Trusted by developers since 2012 with free dev-to-dev support. No credit card required to start your 30-day trial.
    Try AppSignal Free
  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
    Start Free
  • 1
    To Be Top Javaer

    To Be Top Javaer

    To Be Top Javaer - The Path to Becoming a Java Engineer

    toBeTopJavaer is an open source knowledge base and learning roadmap designed to help developers become expert Java engineers. Created and maintained by Hollis, the project compiles a wide range of Java fundamentals, advanced features, and ecosystem knowledge into one structured guide. It covers core Java concepts, JVM internals, multithreading, frameworks, databases, system design, and interview preparation. The repository is presented in a structured, progressive format so learners can follow along step by step while also diving into specific areas of interest. ...
    Downloads: 2 This Week
    Last Update:
    See Project
  • 2
    nmrshiftdb2
    nmrshiftdb2 is a NMR database (web database) for organic structures and their nuclear magnetic resonance (nmr) spectra. It allows for spectrum prediction (13C, 1H and other nuclei) as well as for searching spectra, structures and other properties. The nmrshiftdb2 software is open source, the data is published under an open content license. The core of nmrshitdb2 are fully assigned spectra with raw data and peak lists (we have pure peak lists as well). Those datasets are peer reviewed by a...
    Leader badge
    Downloads: 76 This Week
    Last Update:
    See Project
  • 3
    grafx - Extensible Java Graphics Package

    grafx - Extensible Java Graphics Package

    Extensible Line-drawing & Polygon-filling Rasterization Libs for Java

    Line-drawing and polygon-filling rasterization algorithms in Java. Simple 2D package and more complex 3D package with Z-buffering. Texture mapping not supported at the moment. Color interpolation for lines, Gouraud shading for polygons fully supported. Floating point vertex coordinates, not integer. Pixel-level aliasing, not endpoint aliasing. Doesn't use Bresenham line style! Works with all Java versions. No external dependencies. Suitable for study in academic institutions,...
    Downloads: 1 This Week
    Last Update:
    See Project
  • 4
    ASAF - Another Swing App Framework

    ASAF - Another Swing App Framework

    an OSGi-based Swing Application Framework

    Downloads: 5 This Week
    Last Update:
    See Project
  • Try Google Cloud Risk-Free With $300 in Credit Icon
    Try Google Cloud Risk-Free With $300 in Credit

    No hidden charges. No surprise bills. Cancel anytime.

    Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.
    Start Free
  • 5
    mzMatch is a Java collection of small commandline tools specific for metabolomics MS data analysis. The tools are built on top of the PeakML core library, providing mass spectrometry specific functionality and access to the PeakML file format.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 6
    LDPartEditor

    LDPartEditor

    Create and edit LDraw™ parts quick and easy.

    LDPartEditor is a free CAD tool for the creation of LDraw™ parts. Minimum System Requirements: - OpenGL 2.1 compatible Graphics Card - Operating System (64-bit): Windows [7 or newer], Mac OS X [>=14], Linux [e.g. Linux Mint >=22] - CPU: Multicore-Processor e.g. Intel Core 2 Duo or AMD Athlon II (>2.0Ghz) - RAM: 4 GB - Video-Memory: 1 GB - Free Disk Space: 150 MB Recommended Requirements: - OpenGL 3.3 compatible Graphics Card - Operating...
    Downloads: 13 This Week
    Last Update:
    See Project
  • 7
    Rapid ERP Development

    Rapid ERP Development

    Great Open Source Plugins For iDempiere ERP Project

    I created a set of simple plugins to use iDempiere ERP with Unicenta POS, Android Scanner, Budgeting, Warehousing, Manufacturing, on-the-fly generators for App Dictionary, CRM Board and Charts, Kanban Board, Translation and more. Always complete with full technical documentation, blogs and movie tutorials. No information hiding. Its the open source sharing passion and i wanted to give it all back. Much of my present work is sponsored by SYSNOVA, the largest iDempiere conglomerate user and...
    Downloads: 7 This Week
    Last Update:
    See Project
  • 8
    CoffeeWebServer

    CoffeeWebServer

    An http 1.1 server written in Java

    NIO HTTP/1.1 Web Server with support for multi-part forms, custom servlets, cookies, sessions, SSL, gzip and deflate encodings, pipelining, and more! Written in 100% Java with core server reliance only on the base jdk library.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9
    Rifidi is a middleware and development platform for RFID. With Rifidi you can prototype an RFID application down to the core RFID Hardware and using Rifidi Edge you can easily develop business rules to turn RFID events into real business applications.
    Downloads: 3 This Week
    Last Update:
    See Project
  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
    Try free now
  • 10

    RecordEditor

    Editor for Fixed Width, Csv and Existing Xml files.

    The RecordEditor is a Data File editor for Flat Files (delimited and fixed field position). It supports Unix / PC / Legacy (e.g. Mainframe) file formats, both Text and binary files. The Editor uses a Record-Layout description to format the files. This is ideal for Fixed width (Text or Binary) files, Cobol Data Files, Mainframe files and complicated Csv files. Cobol Copybooks can be used to format Cobol Data files. As well as an editor, The following utilities are supplied * Formatted...
    Leader badge
    Downloads: 23 This Week
    Last Update:
    See Project
  • 11

    Serial-Master

    Serial/TCP terminal: ANSI color, logging, HEX input, & XLSX docs.

    Serial-Master is a comprehensive, cross-platform terminal application for both serial (COM) port and network communication, featuring a modern, intuitive graphical user interface (GUI) designed for simplifying debugging and monitoring tasks. Core Communication & Debugging Features Serial-Master is not just a basic terminal; it's a powerful tool with specialized features for data analysis and control: Advanced ANSI Color Display: Enhance data readability with support for ANSI color...
    Downloads: 3 This Week
    Last Update:
    See Project
  • 12

    LegacyInsight

    Legacy reverse engineering tool

    LegacyInsight is an AI-powered reverse engineering platform that transforms legacy software systems into comprehensible business logic. Using cutting-edge GenAI, it analyzes legacy and extracts core operations, business rules, and data transformations—all translated into natural language. LegacyInsight supports enterprise-grade systems built on Java, COBOL, NET and other legacy stacks, helping organizations reclaim understanding of business-critical code.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Joget

    Joget

    AI Powered Open Source Platform to Easily Build Enterprise Web Apps

    Joget offers an open-source, AI-powered platform that converges no-code/low-code development with AI to rapidly build and customize enterprise applications at scale. By combining AI with visual app builders—not raw code—Joget makes app generation faster, safer, and more accessible for everyone. With Generative AI and Agentic AI capabilities, Joget Intelligence enables organizations to automate and enhance processes while maintaining oversight and compliance. Unlike typical AI code...
    Downloads: 18 This Week
    Last Update:
    See Project
  • 14
    Re-Winder

    Re-Winder

    Track & review PC activity with automated screenshots and time-lapse!

    ...It runs as a single-instance application, preserving settings across sessions. Installation is simple, with a Windows executable bundled with JRE, requiring no additional Java installation. It supports Windows 7/8/10/11 and runs optimally with 4GB RAM, 100MB initial storage, and a 1080p display. This first release includes all core functionalities, making Re-Winder ready for daily use.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 15

    Wheefun Graphics Library

    Portable Graphics Primitives

    The Wheefun Graphics Library (WFGFX) library implements basic graphics primitives that are designed to be used portably between different backends. The basic implementation includes support for the C and C++ programming languages. WFGFX at its core provides interfaces for manipulating both raster and vector images through an abstract graphics context; in many cases, several low-level primitives exist for more direct manipulation. It is designed to be easily ported to other programming environments like .NET and the Java Virtual Machine, making the codebase reusable as a result.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Codefather

    Codefather

    A programmer's guide to programming

    Codefather is a large programming learning resource and guide maintained by the creator “程序员鱼皮” (Programmer Yupi) that aggregates comprehensive learning pathways, tutorials, knowledge sharing, and practical project examples for many programming languages and technologies. It’s designed to serve as a one-stop programming encyclopedia that covers foundational learning routes for Java, front-end, Python, C++, algorithms, and core computer science topics, making it useful for beginners, career-changers, and students. In addition to structured learning paths, the repository includes curated educational content such as coding exercises, interview questions, study guides, and real-world project tutorials to help learners build skills systematically. ...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Spring Data R2DBC

    Spring Data R2DBC

    Provide support to increase developer productivity in Java

    Provide support to increase developer productivity in Java when using Reactive Relational Database Connectivity. Uses familiar Spring concepts such as a DatabaseClient for core API usage and lightweight repository-style data access. The primary goal of the Spring Data project is to make it easier to build Spring-powered applications that use new data access technologies such as non-relational databases, map-reduce frameworks, and cloud-based data services.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 18
    ...When using the manual download from there, you also need to include the following jar files in your project: juel-api-2.2.7.jar, juel-impl-2.2.7.jar, commons-beanutils-core-1.8.3.jar and commons-logging-1.1.1.jar API: http://colllib.sourceforge.net/apidoc/ NEW: colllib switches to Java 8 starting with colllib 2.0. If you depend on an older VM-version, please stick to colllib-1.6.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    BotCity Framework Core

    BotCity Framework Core

    BotCity Framework - Open Source RPA

    Core module of the BotCity RPA framework. Basically, this module provides features to recognize UI elements and interact with it using mouse and keyboard actions. There are a number of third-party dependencies used in the project. Browse the Maven pom.xml file for details of libraries and versions used.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    DDDplus

    DDDplus

    A lightweight flexible development framework

    DDDplus, originally cp-ddd-framework(cp means Central Platform, lightweight flexible development framework for complex business architecture. A set of lightweight business mid-stage development framework, based on DDD thinking, is committed to the precipitation and inheritance of business assets, comprehensively solves the expansion problem of complex business scenarios, realizes the core elements of mid-stage, and empowers mid-stage construction. Integrating the complex ecological...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    TXM

    TXM

    Unicode XML TEI text analysis platform

    TXM is a free and open-source cross-platform Unicode & XML based text analysis environment and graphical client, supporting Windows, Linux and Mac OS X. It can also be used online as a J2EE standard compliant web portal (GWT based) with access control built in. DOWNLOAD LATEST VERSION OF TXM : http://textometrie.ens-lyon.fr/spip.php?rubrique61&lang=en TXM offers a comprehensive range of analysis tools (concordances, collocate search, frequency lists, etc.) based on the powerfull CQP...
    Downloads: 15 This Week
    Last Update:
    See Project
  • 22
    Guice

    Guice

    Lightweight dependency injection framework for Java 6 and above

    Guice is a lightweight, open source, dependency injection framework for Java 6 and higher. It was made to alleviate the need for factories and using new in your Java code. You would still need to write factories in some cases as you normally would, but with Guice your code will no longer directly depend on these factories. In most cases, they will also be easier to change, unit test and reuse. Guice fills in a lot of the missing features in core Java, and helps to design better APIs. ...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    javaboy-code-samples

    javaboy-code-samples

    Collection of Java code examples and demo projects

    javaboy-code-samples is a well-curated collection of Java code examples and demo projects assembled by a prolific instructor and blogger to illustrate key concepts in backend development. Rather than focusing on a single application, it groups many small sample programs and projects that exemplify usage of Java core APIs, Spring Boot, frameworks like GRPC and Shiro, REST services, JWT, web security, caching, asynchronous processing, and database interactions. ...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    Hippo4j

    Hippo4j

    Powerful dynamic thread pool framework with monitoring/alarm functions

    Dynamically observable thread pool framework to improve online operation guarantee capabilities for business systems. Dynamically change thread pool parameters when the application is running, including not limited to core, maximum thread, blocking queue size, and rejection strategy, etc., and support different node thread pool configuration differentiation under the application cluster. Buried when the application thread pool is running, it provides four alarm dimensions, such as...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    OpenbravoTech

    OpenbravoTech

    Openbravo ERP is an open-source enterprise resource planning (ERP)

    Openbravo ERP is an open-source enterprise resource planning (ERP) software that helps businesses manage their core business processes, including financial management, purchasing, sales, inventory management, and project management. It is based on a web-based architecture and offers a modular design, allowing businesses to easily customize and extend the software to meet their specific needs. Openbravo ERP is available in both cloud-based and on-premise deployment options and supports...
    Downloads: 20 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB