Nintendo DS

I bought the R4 card for my Nintendo DS in Thailand. So far it has been working like a charm. It holds a small OS capable of displaying pictures, playing music and of course, run NDS ROM files.
After looking around for some nice homebrew software I stumbled upon this site witch held a lot of usefull software for the DS. What I really would like is a chinese flash cards app for the DS. That would be awsome, the combination of the stylus and the ability to take it with you just opens up a whole new world of practice. If I find any, I will post them here.