UCI chess engine
Play chess from your terminal
Sunfish: a Python Chess Engine in 111 lines of code
Chess engine written in Pascal with an UCI interface.
Prebuilt UCI- and XBoard-compatible chess engines.
Portable UCI- and XBoard-compatible chess engines.
A promising chess program
Chess application whichs allows working with chess PDF books and PGNs.
Bu chess An easy way to play and train chess on your PC
A free Chess program for Windows with a large set of features
Chess Database and PGN viewer
GUI of chess