Freeware by Dr. David Kirkby. Windows, Unix, Linux. A project based on Scid (see above) and with several enhancements. For instance ChessDB supports more languages, and you can download pgn files directly from The Week In Chess (TWIC) and ICC. See the program's homepage for further information and download. Homepage: ChessDB homepage. Download: http://chessdb.sourceforge.net/downloads/