UCI chess engine
GUI of chess
Chess Stats is a slightly different way to analyze your chess games.
ChessMD is a Qt-based chess game viewer with engine analysis
Chess application whichs allows working with chess PDF books and PGNs.
Chess Database and Toolkit program
The forever free, ad-free and open source chess server
Chess Database application
An extremely strong chess engine.
JavaScript chess with board rotation, pgn output, forward/back & save
Read and write PGN format and test moves for legality.