I regularly share flash fiction and short stories on my Patreon. Mostly by me, but sometimes solicited from other people.
A large number of these are exclusively available to my patrons, but some are also freely available to the public.
Solicited (AKA: Not written by me):
That image goes to a Patron-locked Patreon page but the story can also be found for free on Kobo and Barnes and Noble and for a minimal price on Amazon.