Free Tetris
- Flash-based online game featuring ten levels and score.
- http://www.freetetris.org/

JS Tetris
- Javascript game includes choice of start level and Hall of Fame.
- http://www.idep-multimedia.com/tetris/tetris.php

Tetris
- Java implementation written Edwin Martin. Features screen buttons, as well as keyboard interface.
- http://www.bitstorm.org/tetris/

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

Swoj.com Tetris
- Online version of Tetris puzzle game including high score tables.
- http://www.swoj.com/tetris/

Multris
- Realtime multiplayer game that you can play directly in your web-browser, no plug-ins needed. (Java)
- http://www.multris.com

Netris
- Play Tetris online.
- http://www.emeline.com/tetris

Hextris
- Rotate and place hexagonal pieces on the board in this online version of Tetris in Java.
- http://www.hextris.com/

JTed
- A Columns clone. Includes top 30 highscores, licensing rules for webmasters, statistics and game which includes 2 lives, sound and the option to change speed.
- http://www.jted.com/