Usagi, a Saiyan Child
Crossover between Sailor Moon and Dragon Ball Z written by Kichigai Joshi. Over 150 chapters.

Umarekawaru
Fiction by Hiasobi based on series including Slam Dunk, Rurouni Kenshin, Flame of Recca, Gundam Wing, Card Captors, and Harry Potter.

Under The Sakura Tree
Small collection of fiction from series including Fushigi Yuugi and Final Fantasy.