Falling Blocks
- Includes a different style of Tetris with this online web browser game.
- http://www.uptoten.com/kids/kidsgames-coordination-tetris.html

Online Tetris
- A browser based version of the game. Provides a variety of difficulty settings.
- http://www.pcbit.com/onlinetetris/

Tetris
- Tetris game featuring daily highscore lists. Requires a Java compatible browser.
- http://www.yook.de/tetris/

Java Tetris
- Online Tetris game with piece preview and ten different speeds. Java source code is freely available, under the GPL license.
- http://www.percederberg.net/home/java/tetris/tetris.html

Hextris
- Java based version of Tetris where the classical pieces have been replaced with hexagonal objects.
- http://www.hextris.com/