Hardcore Tetris - Tetris but faster every time you complete a line
Good Old Tetris - Play Tetris Online. The game that will never get old.
Tetris 99 - Tetris is now a battle royale game
NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.
Word Tetris - Tetris with words
Blockinger - An open source Tetris clone for Android.