I’ve had a couple of these accepted. So much fun!
Tiny Text Calls for Submissions
Tiny Text publishes teeny tiny Twitter-length fiction and memoir: each piece must be 140 characters or less, including spaces and punctuation—no other limits except quality. Tiny Text is also interested in serialized fiction and memoir, as long as each section is 140 characters and can stand alone while also contributing to the whole.
Please send up to three pieces at a time via email (at firstname.lastname@example.org) or direct message on Twitter (at @Tiny_Text). Tiny Text does not publish bios nor titles, but does accept tweets that have previously appeared in other places.
If your work is chosen, Tiny Text asks for first electronic rights and non-exclusive rights, and that you please include “First published by Tiny Text” as an epigraph for your story or essay if it’s later published elsewhere.