JMPalm is a port of the juggling simulator JuggleMaster to PalmOS. It should run on any device running PalmOS v2.0 or greater. It is of course completely free, so head over to the download page and download it today.
The original JuggleMaster for DOS was written by Ken Matsuoka. JuggleMaster X was written by Masuda Kazuyoshi, and is the version that JMPalm is based on.