I need a good F2P with a decent pet system that can work on a low spec computer. Class evolution is a huge plus! Please, someone help me..

Nostale is your best bet.

Eudemons Online has a "Pet/Minion" system with evolution.

Hmm Nostale looks decent, and I have tried EUdemons. By evolving I mean like you start out a warrior but end up a swordsman or something. Any more pet system mmorpgs?

lawl.

www.neopets.com

www.pokemoncrater.com