A "creative" forum which I then moved all the creative outlet stuff and the topics posted in entertainment/media more recently that fit into that category. Use it for posting creative stuff in general.
A worldbuilding forum which is for creative worldbuilding more specifically.
Both of these forums (as well as science and entertainment/media to some extent) are about to get a large influx of posts from the forum that's merging with GTX0, probably sometime in the next few days.
Worldbuilding will also be getting a large amount of posts probably today in a "mock run", but they're all going to be locked and then re-deleted, so don't respond to anything!