Since there have been two major updates in the past day, here’s the list of companies that I know of (and let me know if there’s any I’ve missed, I’ll try to add them) that have or specifically have not signed the GSL. I’ve also tried to source them in some way.
- Necromancer Games: Staying OGL/Pathfinder. (A big shame, since the head of the company is very pro-4e and had some good stuff planned. Also, their front page still says they are going 4e.)
- Goodman Games: Using the OGL to produce 4e material for GenCon, then signing the GSL for the October date.
- Kenzer & Co: Producing 4e material through fair use copyright, not signing GSL.
- Paizo: Making Pathfinder, of course.
- Green Ronin: Not signing GSL, going all OGL, likely to focus on its own OGL systems.
- Adamant Entertainment: Producing 4e material through fair use copyright.
- The Inner Circle: Signed the GSL.
- Mongoose Publishing: Signed the GSL for at least one game line. Probably will produce other OGL content through other game lines.
- RedBrick Limited: Signed the GSL (making Earthdawn 4e.)
- Open Design: Patron adventures yes for 4e, Kobold Quarterly no.
- Paradigm Concepts: Not signing GSL, producing OGL products.
- Expeditious Retreat Press: Signing the GSL for one game line, producing other OGL products
If the goal by WotC was to get the big name 3rd parties onboard with the GSL… well, that goal clearly has failed or in the case of the fair use users, downright backfired. If they wanted a lot more control over the license and to stem the tide of products, that seems to be the end result.