some current fandom exchanges

sunflower_auction has opened bidding until May 30th, 11:59PM UTC. You can go through their tags to see if anything catches your eye.

justmarriedexchange, a marriage-themed multifandom exchange for marriage tropes of all kinds, has opened nominations until May 27th, 11:59PM UTC. The schedule and rules are here.

bdsmexchange, a kink themed free-form fic/art exchange, has also opened nominations until May 30th, 11:59PM EDT. More info can be found this way.

multifandomdoodle, a low pressure fanart exchange, has opened nominations until May 28th, 11:59PM UTC. The rules/FAQ are here.

raremaleslashex has opened sign-ups until May 28th, 10PM UTC.