One of my favorite past times is table top RPGs like D&D. When I stumbled across a system based off of the FF worlds, I was blown away. This is an extremely polished (5 years in the making!) fan-made tabletop RPG, utilizing many of the core FF elements (MP, jobs, def, etc.)
The core rulebook is free to download at
http://www.returnergames.com/ under the "Rules" section. Take a look at it, they have over 30 jobs! ^^