Here's (most of) my collection of RPGs and tabletop games.  Let me know if you'd like to see any of these adapted for use in Fantasy Grounds.

• World of Darkness 1st and 2nd editions (I'll acquire the new editions if there's interest)
• Warhammer Fantasy Role-Play (1st and 2nd editions)
• Morrow Project
• Fading Suns
• Star Wars - West End editions
• Mordheim
• Warhammer Fantasy Battles
• Paranoia 2nd, 5th, and XP editions.
• Call of Cthulhu 2nd edition
• Ars Magika
• Shadowrun 2nd and 4th editions
• Battletech Classic
• Cyberpunk
• Space Master
• Star Trek Starship Simulator (FASA)
• Star Trek RPG - FASA and Last Unicorn editions
• Dr. Who - FASA edition
• Rifts
• Aeon (Trinity)

I'll probably use the 1st ed of the WoD ruleset (only because I have THOSE books).  So, is there a central place where you got all those rulesets?  At least half of these I'd like to take a look at, if only briefly.

Heavens no, those aren't my FG rulesets, those are my RPG collection from the bookshelf. 

The FGWiki site is the best place I've found for rulesets, if you can't find something to beet your specific needs, there are a number of generic rulesets that have character sheets built to work with pretty much anything.

Dear Lord!

Well, I can't really complain though.  I just have the rules for AD&D and WoD, but I ended up collecting about 40 WoD books and nearly 30 D&D books.

Eidt - forgot Rifts :P