With Go Quest you can play the board game of Go (Igo/Baduk/Weiqi) online with people around the world.
The most interesting feature about Go Quest is that there are only 9x9 and 13x13 boards.
May be the only place in the world where you can play quick small board games with so many serious players (beginners to lots of pros).
You can play Go Quest from smart phone apps (recommended) or PCs.