Some people has already stated the obvious one, but I think I'll say it once again haha~

Aphorism abilities varies according to one kanji they chose
Luck Stealer stealing luck by touching people
Alive: Saishuu Shinkateki Shounen
Deadman Wonderland
Enigma end abruptly, boring one. but the abilities are pretty unique
Kekkaishi
Konjiki no Gash!! demon child fighting using book spells, pretty good
Recca no Honoo there're balls with specific kanji for fighting (madougu)
MAR same author as Recca
MxO
Ueki no Housoku
Wizards Nation i still cannot fully grasp the idea behind their abilities but it's pretty good