Besides the 3 core books, which sourcebooks/rules are you using in your campaign?

[Krug]

Besides the Big 3 (PHB, DMG, MM), which books/material are you using in your campaign, Wizards or otherwise?

 

[Roland Delacroix]

All of them.

 

[Nightfall]

Do you really need to ask?

Seriously I use all the SL stuff, but only for my campaigns.

Otherwise I use D&Dmg, MotP, Magic of Faerun, Lords of Darkness, GR aplenty, and some Mongoose.

 

[Storminator]

Those with recent appearances:

Spells and Spellcraft
Traps and Treachery
Constructs
Alchemy and Herbalists
Tome & Blood
Sword and Fist
Seas of Blood
Masters of the Wild
Legions of Hell

Upcoming:

Many FR books, as I'll be both playing in and DMing some FR games.

That's a pretty healthy chunk of my books! Guess I bought well.

PS

 

[Weeble]

I use too many of them

 

[Psion]

Well I peck for lots of little supplements, but regular references are (referring to my main D&D game here... of course the story is totally different for the SW game and proposed DS, Spycraft, and T20 games):

WotC

Sword & Fist (probably the most used/useful, contrary to the disdain of many whiners)
Tome & Blood
Song & Silence
Masters of the Wild
Defenders of the Faith
Manual of the Planes
Oriental Adventures
Magic of Faerun
Psionics Handbook

Others
Book of Eldritch Might (I, not II)
Relics & Rituals
Creature Collection I&II
Legions of Hell
Armies of the Abyss
ED: Shamans
EA: Necromancy
EA: Constructs
Seas of Blood
Necromancer's Legacy
If Thoughts Could Kill

There are others I use occasionally or are planning on using soon, such as some quintessential books, Wild Spellcraft, and some of AEG's one name books.

Edit: Psionics Handbook! Duh!

 

[Broken Fang]

Though I would prefer to use only the three core books most of my players have a ton of them. I pretty much let them use them all. As a PC I have yet to use anything other than the core books when creating my own character. I don't have the time to look through everything else and some of what I have seen has not inspired me. I just have fun with the basics.

 

[Jerrid Al-Kundo]

Wow... Here's the list:

WotC
Psionics Handbook (PsyWarriors Only)
Forgotten Realms Campaign Setting (Feats and Spells, some PClass abilities used in my own PClasses)
Wheel of Time
Call of Cthulu
Sword & Fist (Feats and some weapons)
Oriental Adventures
Star Wars (Wounds & Vitality)
Manual of the Planes

Sword & Sorcery Studios
Relics & Rituals (almost all of it)
Divine & Defeated (spells)
Creature Collection
Wise & Wicked

Mystic Eye Games
Mystic Warriors

Bastion Press
Ink & Quill
Norse Gods
Arms & Armor
Alchemy & Herbalists
e-Minions

Mongoose
Quintessential Fighter (will be getting more; Recent move drained my assets)
Demonology
Slayer's Guide to Hobgoblins/Gnolls/Winter Wolves/Centaurs/Troglodytes

Malhavoc Press
If Thoughts Could Kill (rules editions)
Eldritch Might
Eldritch Might II

Fan Netbook Community Council
Netbook of Feats
Witches & Warlocks

Netherland Games
The Primal Codex

AEG
Evil

Web Sites/Online Conversions
Birthrite Material
Dark Sun (Ranger and other bits & pieces)
Creature Catalogue

Non-d20 [Conversion Work]
2E Shaman Accesory
Role-Master Alchemy Companion
Ars-Magica Shaman
Spells & Magic (Spell Points)
Skills & Powers (Psionic Powers)
Illithiad
The Will & The Way (Psionic Powers, Harbingers & Constructs)
Planescape (bits & pieces)

Well, that's not everything I own, but it's all I'm actually using.

I'm working on a "spin-off" campaign that will also use the following:

Natural 20 Press
Wild Spellcraft

Polyhedron
SpellJammer

Non-d20 [Conversion Work]
SpellJammer Box Set

 

[Weeble]

Though I would prefer to use only the three core books most of my players have a ton of them. I pretty much let them use them all. As a PC I have yet to use anything other than the core books when creating my own character. I don't have the time to look through everything else and some of what I have seen has not inspired me. I just have fun with the basics.

me too

 

[JoeGKushner]

Man, the real question would be which ones am I not using. Smaller list.

I'm GMing a Scarred Lands campaign and players pretty much have access to most books since I get a lot as a reviewer and buy a lot on my own. AEG and Mongoose aren't on any the regular list I'm on but I do get some AEG stuff for Campaign and Games Unplugged.

I've used a lot of Monte's stuff, lots of Scarred Lands, Bluffside and Freeport, Librum Equitis I & II, Secret College, etc...

Of course official D&D books always have their place ala Psionics Handbook, Manual of the Planes, F&A, D&D, etc..