Freeware: Remove the clutter with ClearTemp
Hate getting those messages on your Windows Mobile device saying that you’re phone is low on free space? Where does it all go? Basically the CCleaner for Windows Mobile, ClearTemp clears out all the unwanted temporary files created by Windows Mobile and programs on your phone. This is really useful when it comes to temp files stored in Windows. On my Touch Diamond, which is notorious for memory loss and leaks, I was able to go from about 4MB of free space to about ~45MB of free space in Main Memory.
In addition to allowing you to delete temporary files, you can manage mail attachments, dead registry entries, clear cache from IE and Opera and delete files left behind during uninstalls. One of the features that I noticed that was very useful was the ability to create custom folders can store all temp and bloat files, so that ClearTemp can automatically erase them on a maintenance schedule that you can setup. The interface was somewhat easy to use. For the most part it is a great app and is a must-have tool if you are having problems with storage on your phone.