Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
Numi App - Numi is a beautiful text calculator for Mac.
Chess.com - Play chess on Chess.
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
Fritz - Fritz is the world’s most popular chess program, developed by ChessBase, “the world's leading...
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.