ChessX is an Open Source chess database. With ChessX you can operate on your collection of chess games in many ways:
browse, edit, add, organize, analyze, etc.

• Load and save PGN files
• Work with multiple databases simultaneously
• Browse games, including variations
• Enter moves, variations, comments
• Play games in training mode or play out games against an engine
• Setup board, copy/paste FEN, merge games
• Lint tools to catch performance, usability, version compatibility, and other problems.
• Display opening tree for current position
• Analyze using UCI and Winboard/Xboard Chess engines
• Observe and play games on FICS