Favorite Companies for Adventures?

[Kthulhu]

What are yours? Any game/system. 1st party or 3rd party. List as many as you feel like.

Frog God Games - Old school style adventurers, but you can play them either old-school or new school (ie, Swords & Wizardry or Pathfinder). My personal favorite D&D-type publisher. They're also putting out a few products that fill a niche that Paizo hasn't touched...adventureres that are longer than 32 page modules, but shorter than a full 1-15 campaign.

Chaosium - Adittedly, new stuff is fairly rare from Chaosium these days, but they've put out some of the greatest adventurers ever published in the industry.

Paizo - Great campaign setting, and very good adventures within it. Unequaled in providing full campaign length adventures for a D&D-type game.

[Digitalelf]

I'd have to say:

For D&D/D20/PFRPG

Paizo
Necromancer Games
Goodman Games
Green Ronin

For Call of Cthulhu

Chaosium
Pagan Publishing

And back in the day, TSR put out some good adventures for multiple game systems...

[Bluenose]

I'll give three.

Games Workshop, just for The Enemy Within campaign for Warhammer.

Chaosium, not just for their Call of Cthulhu material but there were plenty of excellent adventures for Runequest and Stormbringer.

FASA for Traveller/MegaTraveller. Even ahead of Digest Group Publications, who also produced terrific material without their adventures being quite as good.