justmarriedexchange is taking tag nominations now. Tag set here.
(It has occurred to me that the Owen-Tosh-Ianto set lend themselves beautifully to all kinds of prompts involving bringing someone back from the dead through tropey marriage-related means. The tag set includes, for example, the following tags:
Blood Ritual Accidentally Results in Marriage
Eldritch Marriage Ritual
Marriage to Stop Eldritch Forces From Re-Entering The World
Marrying the dead keeps them alive
Resurrection Spell Requires Ritual Marriage
Resurrection Sex Spell Gone Wrong Results in Unbreakable Magical Marriage Bond
Time Travel Backward To Fix The Past Also Results In Unexpectedly Getting Married
.... I mean.)
smallfandomfest has started a new round and is currently taking small fandom promotion claims and small fandom prompt submissions.
fkficfest has released all the stories for the 2020 event! Master list here.
intoabar is taking signups for their spring round.
bannedtogetherbingo2020 is a new fest offering bingo cards containing prompts which have been used as justifications for book-banning or censorship, and offering further education on the history of censorship. Their fandom-calendar post contains all the relevant info and links. muccamukk also linked to this question and answer talking about their reasons (which fwiw sounds reasonable and well-thought-out to me) for including prompts that many people would consider in poor taste or even harmful. You can view the full prompt list here.
hc_bingo is running their May amnesty challenge, offering squares of four prompts to be used in a small-fandom fill.
unconventionalfanworkex is currently taking tag nominations. I did this last year and really enjoyed it, but I'm sitting this one out because I just have Too Much right now. This entry is also posted at https://sholio.dreamwidth.org/1325715.html with comments.