WeKAb - Connecting Knowledge
Chess Tempo Database - Chess Tempo Database gives you a library of more than 2 million searchable chess games.
Newton Virtual - Learn and enjoy
DecodeChess - AI chess tutor and analysis
Crehana - Crehana is an on-demand learning platform.
ChessPad - ChessPad is a feature-rich chess game viewer and PGN file editor available for Windows.