The full collection of official derivative versions of Ubuntu 9.04 includes: Kubuntu, Xubuntu, Edubuntu, Mythbuntu, Ubuntu Studio, Ubuntu Server, Ubuntu-MID, and Hiweed. I have gathered all the official download links. The download speed may be slow, so it is recommended to use BT or eMule for downloading. Each version provides 64-Bit and 32-Bit downloads via both BT and HTTP.