Chess Hero is described as 'How does it work? You supply a set of PGN files The program picks random positions from the PGN files and challenges you to guess the best move computed by a chess engine On every attempt you are given a penalty (the difference in score between your move and the engine'. There are more than 10 games similar to Chess Hero for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and BSD. The best alternative is Scid vs. PC, which is both free and Open Source. Other Chess Hero like games are ChessX (Free, Open Source), Chessable (Freemium), Chess Tempo (Freemium) and Chess Assistant (Paid).
Shane's Chess Information Database is a powerful Chess Toolkit, with which one can create huge chess databases, run engine analysis, or play casual games against the computer or online with the Free Internet Chess Server.
eboard is a chess interface for Unix-like systems (GNU/Linux, FreeBSD, Solaris, etc.) based on the GTK+ GUI toolkit. It provides a chess board interface to ICS (Internet Chess Servers) like FICS and to chess engines like GNU Chess, Sjeng and Crafty.
MasterChess 8000 is a DVD with millions of recent master games and a high speed search function. It also adds PGN files. MasterChess plays chess with super strong chess engines (any UCI engine can be used) and includes Fischer clock and handicapping settings.