ChessPad - ChessPad is a feature-rich chess game viewer and PGN file editor available for Windows.
ChessDB - ChessDB - a free Chess database for Mac OS X, Windows, Linux, and UNIX - like ChessBase, but better
Chess Tempo Database - Chess Tempo Database gives you a library of more than 2 million searchable chess games.
Chess Opener - Easily explore, analyse and practice chess openings
DecodeChess - AI chess tutor and analysis
Chessquid - Chessquid is a revolutionary chess software for strong players, from club to Grandmasters, to help you during your preparation | 30 days money back guarantee