From Nenad Hrg:
4ur-Windows-8-Mouse-Balls is a lightweight portable Windows program. Eight or more balls follows the mouse on your windows desktop. It's a small fun program for all Windows-NT systems. It features very Small, 3-16 Mouse Balls, adjustable speed, optional Transparency, portable, and multilingual.
What's new in this version:
Version 1.81 includes test and verification for Windows 8.1 on Windows 8.1 Pro and updating of the language files in 4ur-Windows-8-Mouse-Balls.