Showing 498 open source projects for "open source"

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  • 1
    Stockfish

    Stockfish

    UCI chess engine

    ...Read the documentation for your GUI of choice for information about how to use Stockfish with it. Stockfish is a 11-time winner of the Top Chess Engine Championship. Stockfish is open source (GPLv3 license). That means you can read the code, modify it, and contribute back. You can use Stockfish on your computer or on your iOS or Android device. So you can get world-class chess analysis, wherever you are. The Stockfish engine features two evaluation functions for chess, the classical evaluation based on handcrafted terms, and the NNUE evaluation based on efficiently updatable neural networks.
    Downloads: 149 This Week
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  • 2
    AlphaZero.jl

    AlphaZero.jl

    A generic, simple and fast implementation of Deepmind's AlphaZero

    Beyond its much publicized success in attaining superhuman level at games such as Chess and Go, DeepMind's AlphaZero algorithm illustrates a more general methodology of combining learning and search to explore large combinatorial spaces effectively. We believe that this methodology can have exciting applications in many different research areas. Because AlphaZero is resource-hungry, successful open-source implementations (such as Leela Zero) are written in low-level languages (such as C++) and optimized for highly distributed computing environments. This makes them hardly accessible for students, researchers and hackers. Many simple Python implementations can be found on Github, but none of them is able to beat a reasonable baseline on games such as Othello or Connect Four. ...
    Downloads: 13 This Week
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  • 3
    LucasChessR

    LucasChessR

    GUI of chess

    Lucas Chess (R) is a free, open-source chess program designed primarily for training and improving chess skills. It acts as a comprehensive learning platform, offering tools for beginners and advanced players alike. The software includes a wide range of exercises covering openings, tactics, endgames, and visualization techniques. Users can play against multiple chess engines with adjustable difficulty levels that simulate different strengths.
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    Downloads: 3,064 This Week
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  • 4
    Scid
    Scid is a chess database application (cross-platform, for Unix/Linux and Windows) with many search and database maintenance features.
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    Downloads: 349 This Week
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  • 5
    Scid vs. PC

    Scid vs. PC

    Chess Database and Toolkit program

    "Shane's Chess Information Database" is a huge chess toolkit with extensive database, analysis and chess-playing features. Scid vs. PC is a usability and bug-fix fork of Scid. It has many interface fixes and improvements, and is fully compatible with Scid's .si4 databases. New features include a rewritten Gamelist, Computer Tournament, and FICS, Tree, Book and Graph improvements.
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    Downloads: 690 This Week
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  • 6
    ChessX

    ChessX

    Chess Database and PGN viewer

    A free and open source chess database application for Linux, Mac OS X and Windows.
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    Downloads: 362 This Week
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  • 7
    Chess Engines for Android (APKs)

    Chess Engines for Android (APKs)

    Prebuilt UCI- and XBoard-compatible chess engines.

    Installation files for chess engines that provide the Open Exchange (OEX) format. Links to the source code of the built-in chess engines can be found in the corresponding zip archives. In an APK file, chess engines are always available for the following architectures: arm64-v8a, armeabi-v7a, x86, and x86_64. The installation file takes care of the correct installation based on the hardware used.
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    Downloads: 1,028 This Week
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  • 8
    Chess Engines for Android

    Chess Engines for Android

    Portable UCI- and XBoard-compatible chess engines.

    Open source chess engines that support the Universal Chess Interface (UCI) protocol or Chess Engine Communication Protocol (XBoard). They are written in the C, C++, Go and Rust programming language. C and C++ based chess engines were generated with Android NDK, Clang and GCC. Go and Rust based chess engines were generated with their correspondent compilers.
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    Downloads: 338 This Week
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  • 9
    ChessMD

    ChessMD

    ChessMD is a Qt-based chess game viewer with engine analysis

    Downloads: 87 This Week
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  • 10
    ChessForge

    ChessForge

    Chess analysis, training and testing for Windows.

    Chess Forge is a Free and Open Source Windows desktop application facilitating chess training. Use Chess Forge to build your opening repertoire, study endgames, strategy and tactics. Utilize the two distinct solving modes and also Chess Forge's unique Training Mode where you get tested against the workbook's content with the help of the engine. Installation info: https://github.com/czbar/ChessForge/wiki/Installation PDF Manual: https://sourceforge.net/projects/chessforge/files/ChessForge_Manual.pdf/download (35MB due to numerous screenshots) Web Site : https://chessforge.sourceforge.io/ Contact: https://chessforge.sourceforge.io/feedback.html Source Code: https://github.com/czbar/ChessForge New in v.1.15.1 (August 2026): https://github.com/czbar/ChessForge/wiki/Release-History
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    Downloads: 300 This Week
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  • 11
    chessPDFBrowser

    chessPDFBrowser

    Chess application whichs allows working with chess PDF books and PGNs.

    Chess application which allows working with PDFs and PGNs. You can work with the chess games of the PDF and edit their tree of variants. Graphical environment. Standard PGN TAGs. PGN comments. Ocr like (Fen string detection from chess board position images). Connection to Uci chess engines (like stockfish). Position analysis, full game analysis. You can now play games against uci engines. pdf2pgn command line command included. Detailed documentation. Multilanguage...
    Downloads: 49 This Week
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  • 12
    PasKnight

    PasKnight

    Chess engine written in Pascal with an UCI interface.

    PasKnight is a UCI compatible chess engine. It does not have a graphical interface of its own; instead, it runs as a console application that communicates via text commands with a GUI (like Arena, CuteChess, or WinBoard). PasKnight is written in Pascal using Lazarus & Free Pascal compiler. Executables are provided for Windows, Linux and macOS. Elo of the engine v1.00rc21 is around 2620
    Downloads: 10 This Week
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  • 13
    Accessible-Coconut

    Accessible-Coconut

    A GNU/Linux operating system accessible for visually impaired.

    Accessible-Coconut(AC) is a community driven GNU/Linux operating system which is completely accessible for persons with visual impairment. AC is derived from Ubuntu-MATE. Yes the goal is to make a free and open-source eyes free desktop environment. Forum : https://groups.google.com/forum/#!forum/accessible-coconut Telegram forum : https://telegram.me/accessible_coconut Project home : https://zendalona.com/
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    Downloads: 78 This Week
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  • 14
    Nimzo-3d-Chess-GUI

    Nimzo-3d-Chess-GUI

    A free Chess program for Windows with a large set of features

    The Nimzo_3d GUI is a chess program for Windows 7 - 11 It is an enhanced version of the Tarrasch Chess GUI written by Mr Bill Forster, with many additional features. It has a simple, easy to use interface, so it is ideal for novice players or inexperienced computer users. It also has more advanced features for expert users. So if you just want a casual blitz game against the computer, or to automatically analyse one of the famous games from chess history, it can perform these...
    Downloads: 23 This Week
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  • 15
    Eagle Mode

    Eagle Mode

    Zoomable user interface (ZUI) with file manager, file viewers and more

    Eagle Mode is a zoomable user interface (ZUI) with file manager, file viewers, games, and more. This project is about a futuristic style of human-computer interaction, where the user can visit almost everything simply by zooming in. It features a portable C++ toolkit API for developing such ZUIs, and it features the Eagle Mode application, which provides a virtual cosmos with plugin applications. The most important one is the professional file manager with its rich, scriptable command...
    Downloads: 26 This Week
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  • 16
    Chess Tools for Android

    Chess Tools for Android

    Scripts and tools for building and testing chess engines.

    Open source scripts and tools for Android. Every zip archive contains a readme file with further information (e. g. link to the source code). Chess tools are located in the libs directory and are available for arm64-v8a, armeabi-v7a, x86 and x86_64 based devices. CECSA (Chess Engine Compiler Script for Android) and CETSA (Chess Engine Tournament Script for Android) are scripts for Termux.
    Downloads: 16 This Week
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  • 17
    JavaPairing is a tool to manage a chess tournament. It is pure Java and can run as is on any platform, including Windows, Linux and Macintosh (JRE 1.6 or more required). It is free and open source under the GPLv3 license. Dutch, Dubov, r.r., Amalfi
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    Downloads: 4 This Week
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  • 18
    belofte chess

    belofte chess

    A promising chess program

    A console/text based chess program with XBoard/CECP and UCI API, available on all major platforms. You may need a graphical chess interface to use it. Please refer to README.md in the files section for installation instructions. The last stable release is 2.2.0 and has been released on 13/04/2026. Belofte 0.2.0 till 0.9.20 (c/c++): Xboard 1 & 2 (CECP) - Linux/Unix/(Windows) Belofte 2.1.1 and up (c++11) : UCI and Xboard 2 - Linux/Windows/Mac/Android/... For access to code, please...
    Downloads: 7 This Week
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  • 19
    Basic Blind Chess

    Basic Blind Chess

    Blind Chess using Taiwan rules

    Blind Chess also known as "Dark Chess" (暗棋) or "Banqi" or Half Chess , is a two-player Chinese board game played on a 4x8 grid, or half of the xiangqi (Chinese Chess) board. This application is using Taiwan rule. AI is using basic minimax tree structure and some rules. Advanced algorithm such as Upper Confidence bounds applied to Trees and Monte Carlo Tree Search are NOT used. This app is single player vs computer only. For English user, Christakis Giorgios made Software Requirements...
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    Downloads: 4 This Week
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  • 20
    A J2ME MIDlet implementing a Portable Chess Board to run on a Java enabled Cell Phone. In order to download the binaries and/or the source files please follow the Files->MobileChessBoard link above.
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    Downloads: 1 This Week
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  • 21
    pgn4web

    pgn4web

    javascript chess games viewer for websites, blogs and live broadcasts

    pgn4web is a javascript chess games viewer for websites, blogs and live broadcasts. "pgn4web has a clean design, and is easily integrated and configured in wordpress. And yet, below that layer of simplicity, it has enough bells and whistles to allow for more baroque needs and taste. A truly great plugin." GM Tiger Hillarp, using the pgn4web plugin for wordpress on his site chess at the bag of cats, May 2013. "We wanted a live viewer that could work on tablets and mobile phones. pgn4web...
    Downloads: 5 This Week
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  • 22
    Chess Tools for Windows

    Chess Tools for Windows

    Batch tools for creating Polyglot books and PGN-based statistics.

    Open source scripts and tools for Windows. Every zip archive contains a readme file with further information. PGNStat and PGNXtract are batch processing tools for Windows. Simply unpack the zip archive into a directory of your choice. The batch files require free and open source third-party tools. These are not included in the zip archives and must be downloaded separately.
    Downloads: 2 This Week
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  • 23

    EloCalculator

    Elo Calculator - strictly implemented FIDE Rating Regulations

    This little tool might be helpful for chess players. The FIDE Rating Regulations (effective from 1 March 2024) are strictly implemented, therefore its calculation is hundred percent accurate. There is a Windows only version (Windows 7 or higher, .NetFramework 4.7.2 or higher (you don't need to worry about this with a current Windows 10 or 11)) ... and a Java version (Java 17 or higher).
    Downloads: 1 This Week
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  • 24
    Downloads: 0 This Week
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  • 25
    Admiral Down Modern Navy

    Admiral Down Modern Navy

    Battleship Game for Debian Linux Systems

    A battleship game enhanced with effects and musics. Github: https://github.com/shampuan/Admiral-Down-Modern-Navy My other works: https://sourceforge.net/u/shampuan/profile
    Downloads: 1 This Week
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