NarfPet (was gPet)
The concept is very simple, it automatically summons a random companion pet everytime you login or change a zone, unless you happen to be mounted or stealthed.
No config, just install and go. 1kb memory usage and nearly no cpu hit.
Made by Narfi@Die Aldor (EU).
Thanks to Neav for the Core Code and Vaka for the Idea.