UCI chess engine
Chess Database and PGN viewer
The SCID 5 format in a clean, deterministic, modular architecture
A free Chess program for Windows with a large set of features
A promising chess program
Chess Database Application
Basic console interface for 3 player chess in a 7x7x7 cube.
A powerful chess engine written in C++
"Kenny" is an XBoard/WinBoard chess engine based on "Winglet"
Read and write PGN format and test moves for legality.