I'm looking for anime/manga (no hentai/hentai-derived items please) that focuses on female yandere characters. I'm reading Mirai Nikki - Future Diary right now, which I'm enjoying a lot. I didn't so much like Misa's character in Death Note.
My friends have recommended Shuffle!, Higurashi, Ah! My Goddess and School Days but I don't know much about any of them. Other recommendations are appreciated.