A tool for disk defragmentation and Windows optimization.
Fast, low overhead, with many optimization strategies. Included are a set of easy to use scripts for endusers, a scripting engine for demanding users, a screensaver, and a combined Windows plus commandline version that can be scheduled by the Windows task scheduler or for use from administrator scripts.

MyDefrag (formerly JkDefrag) is able to handle USB sticks/disks and floppies.