UCI chess engine
Chess training program playing gambits
Batch tools for creating Polyglot books and PGN-based statistics.
Chess engine written in Pascal with an UCI interface.
ChessMD is a Qt-based chess game viewer with engine analysis
Chess Database and PGN viewer
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
A work-in-progress chess bot written in C#
Rust library to create a Good Game Easily
NetChess to play between two players over net or internet
Chess program
SJCE - free portable cross-platform graphical chess game, 100% Java.
Python chess engine
Children's learning programming language Karel the Robot in 3D
Chess Database Application
The forever free, ad-free and open source chess server
A JavaScript game library to quickly develop board games for the web
EXCEL VBA chess engine with chess board
Extensive Java chess database libraries.
Chess Database application