Critters is a member of the Critique.org family of on-line workshops/critique groups, and is for serious writers of Science Fiction, Fantasy, and Horror. You get your work critiqued in exchange for critiquing the work of others, both of which are invaluable ways to improve your writing. It's run by Andrew Burt, former vice-president of SFWA and his army of software minions. Critters is free (except for the work of doing critiques!) and funded by donations; if you find Critters useful, donations are appreciated .
If I were shopping for a workshop, I'd give Critters a close look.
Well run and quite stable
Critters has been profiled in Salon Magazine.
Check out a more detailed description of Critters and what it's like to send a manuscript through the workshop.
Our mission is to achieve a high level of participation in giving critiques on short stories, novel chapters, and entire novels in the genres of Science Fiction, Fantasy, and Horror. The focus is on providing timely, helpful critiques. Our Rules are what make this work.
(And a steady hand on the tiller from the Critter Captain.)
If you're ready to join, come on in.