UCI chess engine
Gui of chess
Chess Database and Toolkit program
Portable UCI- and XBoard-compatible chess engines.
Chess Database and PGN viewer
Batch tools for creating Polyglot books and PGN-based statistics.
Chess analysis, training and testing for Windows.
A GNU/Linux operating system accessible for visually impaired.
Zoomable user interface (ZUI) with file manager, file viewers and more
Chess application whichs allows working with chess PDF books and PGNs.
A promising chess program
javascript chess games viewer for websites, blogs and live broadcasts
Java Schach Turnierverwaltung / Java Chess Tournament Management
A cross-platform chess game.
Chess training program playing gambits
Tool for chess teachers to create PDF files with chess diagrams in it
ChessMD is a Qt-based chess game viewer with engine analysis
Dice endgames — generation of endgames with dices.
Elo Calculator - strictly implemented FIDE Rating Regulations