LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
Cross-platform real-time strategy game (3D)
Teach your students how to figure out tricky texts in any language.
Sudoku web game
a PHP based leaderboard software for Battlefield 4
a PHP based leaderboard software for Battlefield Hardline
a PHP based leaderboard for World of Tanks and World of Warplanes