JkDefrag (*****)(W) - "a disk defragmenter and optimizer for Windows ... Completely automatic and very easy to use, fast, low overhead, with several optimization strategies, and can handle floppies, USB disks, memory sticks, and anything else that looks like a disk to Windows. Included are a Windows version, a commandline version (for scheduling by the task scheduler or for use from administrator scripts), a screensaver version, a DLL library (for use from programming languages), versions for Windows X64, and the complete sources." A really great tool. I have set it up as my screen saver to defrag stuff while the computer is at rest. It is fast and low memory footprint.
Recuva (****)(W) - "freeware Windows utility to restore files that have been accidentally deleted from your computer" It is really nifty. Made by the same people that make CCleaner, it does what it says and looks simple to use.