Well if your into clones and duplicates. Here's a couple.
Natsuiro Kiseki
http://myanimelist.net/anime/12119/Natsuiro_Kiseki
Four middle school girls find that a sacred rock can grant them anything they wish for. Episode 6 has one of the girls split into two by a wish.
Toaru Kagaku no Railgun
http://myanimelist.net/anime/6213/Toaru_...
Middle school girl with a level 5 esper power lives in a futuristic city with many dark secrets. When she was a little girl doctors asked for her permission to get a map of her DNA so to use it to help people with incurable medical conditions. Much later on she is horrified to discover what they really used her DNA for. Takes place in the second season.