This is an amazing utility which helps you to clean up the wasted RAM memory without having to restart the device and eventually saves a lot of time.

Release notes:

Addition to “Backup / Restore” feature you can now select and load default settings from reservoir list.
Fix all s2u2 issues, now you can enjoy working with S2U2 and cleanRAM together! (thanks p50kombi).
New registry key (s2u2Folder) added, this key will you define the right S2U2 folder.
New registry keys added, the first is “s2u2LockAfterCleanup”, this key will help you to lock your screen (using S2U2 application) after clean-up done. the second is “s2u2LockAfterCleanupSchedule” the same thing but work only on schedule mode.
Fix small issue with wake up device screen light.
More compatibility for Windows Mobile v6.5.
New strings for language file added (v1.7.7)
Compatibility for non-touch devices.
Languages files added to cab file (last update: 08.10.09).

http://forum.xda-developers.com/showthread.php?t=514333