ficondemand A fun prompt community. Open to all fandoms, and gen, slash and het prompts. Multiple prompt fills are allowed, no pressure, you don't have to call dibs. Warnings are obligatory. I like reading the prompts themselves, even if there are no fills. There is a good tagging system, so you can easily navigate it.
write_good A community for asking for constructive criticism of your fic. I love the idea of the comm, and think it could be very valuable for writers who don't have a beta reader, and for beta readers who sometimes have a bit of time for critiquing but don't want to make any promises.
But we need some writers to post who actually have some questions to ask about their fic, and have given their writing some thought, and who have a use for any concrit they may receive beyond "feedback! nice".