Play chess from your terminal
UCI chess engine
Chess training program playing gambits
ChessMD is a Qt-based chess game viewer with engine analysis
Chess Stats is a slightly different way to analyze your chess games.
Chess engine written in Pascal with an UCI interface.
Chess Database and PGN viewer
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Create your own tiny chess bot
A work-in-progress chess bot written in C#
NetChess to play between two players over net or internet
a UCI chess engine
Chess program
Python chess engine
SJCE - free portable cross-platform graphical chess game, 100% Java.
A console/ncurses chess engine frontend and PGN editor.
The forever free, ad-free and open source chess server