Fly or Die
Fly Or Die is a large website containing many games, one of which is Go. You can register and play for free, but you must put up with commercial adverts.
The server has a number of peculiar features
- Only one time limit (30 minutes each)
- No undo
- Kanji on stones (火=fire, 冰=ice) and board (text from Spring and Autumn Commentary of Zuo)
- Hikaru style stone impact graphics and noises corresponding to fire and ice
- Yahoo style Elo rating with colour coded bands
- No handicap by default
It is a great place to go to play 9x9 games.