OpeningTree is described as 'Consolidated view of all your chess games from chess.com, lichess, grandmaster games or custom pgn'. There are eight games similar to OpeningTree for a variety of platforms, including Windows, iPhone, iPad, Mac and PortableApps.com. The best alternative is Lichess, which is both free and Open Source. Other OpeningTree like games are Chess.com (Freemium), Lucas Chess (Free, Open Source), XBoard (Free, Open Source) and ChessX (Free, Open Source).
- 8 alternatives