I have used SKTools (
http://s-k-tools.com/index.html?m_downloads.html ) for the last (6) years and have been extremely pleased with the services it offers (full backup, registry explorer, cab maker, cleaner, contact/task/calendar/outlook organizer, etc, etc, etc, etc).
For daily quick cleaning, I use CleanRAM with the latest version 1.7 (
http://forum.xda-developers.com/showthread.php?t=514333 )