I wanted to test my mouse if it works still good or not, and gathered some software to check it, so I can share. You can download it below. Added some fixes too MarkC, cheesemfix, or hidusbf etc.

There are:
Enotus Mouse Test / Mouse Test
mouserate
MouseMovementRecorder
MouseTester
dimr
mouserate (other one)

download (about 10mb):
TinyUpload
SpeedyShare
ZippySHare

Also: http://www.overclock.net/t/1201593/mouse-testing-software