Chess Insight
Chess Tempo Database
ChessDB
Scid vs. PC
DecodeChess
Lichess
ChessPad
Chess.com
Smart Objects
Chess Insight
Smart ObjectsChess Tempo Database - Chess Tempo Database gives you a library of more than 2 million searchable chess games.
ChessDB - ChessDB - a free Chess database for Mac OS X, Windows, Linux, and UNIX - like ChessBase, but better
Scid vs. PC - Chess database and playing program.
DecodeChess - AI chess tutor and analysis
Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
ChessPad - ChessPad is a feature-rich chess game viewer and PGN file editor available for Windows.