Pocket Mechanic v2.98
the author of this app says:
Pocket Mechanic Professional automatically repairs errors and fragmentation, cleans out clutter, makes your mobile device run smoothly and reliably, lets you manage your storage cards and data with ease, and provides you with a robust arsenal of powerful Windows Mobile maintenance utilities.
This download is for Windows Mobile version 6.
Windows Mobile with Touchscreen. Windows Mobile PC, 2002, 2003, 2003SE, 5, or 6. Download is for Windows Mobile Version 6, see developer home page for other device compatible versions.