Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
Xmind - Xmind is a brainstorming and mind mapping application.
Chess.com - Play chess on Chess.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Fritz - Fritz is the world’s most popular chess program, developed by ChessBase, “the world's leading...
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.