Interactive Way to Go
by Hiroki Mori. You can learn here online and interactive the rules of GO.

German Go Association (Deutscher Go-Bund)
Homepage of the German Go Association, which is the main portal to enter the world of Go (in German).

Online-Server KGS
The Kiseido Go Server (KGS) is one of the most favourite Go servers worldwide. The standard service with numerous functions is free of charge. Players from all over the world meet here all around the clock.