I have :
Maplestory (Only Trading the entire account for ____, just look in my thread for more details.)
GrandChase
Lunia
IMVU
GaiaOnline (It's new, It sucks, I got hacked, Oh well.)
Neopets
Audition
TinierMe (I can get LOTS of gold on there : P)

uhm. . .
there's more, I just can't think of them off the top of my head.