domaystic is a daily prompt event based on the domestic trope, running from May 1st-31st. The AO3 collection (with prompts) is
here.
lyricaltitles, a fanfiction challenge/prompt event community, is running an
Album Challenge through the month of May.
3weeks4dreamwidth, an event celebrating the anniversary of this site, is
running from April 25th to May 15th.
thestoryinside, where you are matched with a partner who will pick books off your TBR list and vice versa based off voted for themes, is
still open for May sign-ups. Matches will go out on May 1st.
Rare Kink Buffet, a multi fandom prompt fest based on rare kinks, is still open for sign-ups until May 1st, 3PM UTC.
rainbowexchange, a multifandom gift exchange for everything queer, is
still open for sign-ups until May 1st, 10PM UTC.
recursiveexchange, a fanwork exchange for requesting fanfiction and fanart of other fanworks, is
open for sign-ups until May 4th, 10PM EDT. Nominations are also still open until May 3rd.
fandom5k, a multi-fandom gift exchange for fic with a 5,000-word minimum, is
open for sign-ups until May 4th, 11:59PM EDT.
summerofhorrorexchange, a horror themed fic/art exchange, is
accepting nominations until May 5th, 11:59PM EDT.
booknook is hosting a
Friending Meme.
friending_memes is running two different friending memes: a spring themed one and a multi fandom one.