Pokemon games through telnet.
I've started a project that lets two users have one-to-one Pokemon fights. Both users will be able to connect through telnet, enter a room and then fight. For starters, the battles will take place in a command like interface. I'll then look if I can move forward and make a real Pokemon interface (with drawn ASCII Pokemons, HP, levels and so on).
You can check out the progress of the project here.