Fanfiction Critique Group-
An amazing group to join if you're looking to improve your writing skills. Read and review other peoples work and get feedback on your own. They also run challenges every 8 weeks to kickstart your inspiration :)
Fanfiction.net-
Probably well known :) Place for posting stories of almost any genre up to a rating of R.
Write or Die-
A tool that has helped me complete at least 6 fics since I started using it. Extremely helpful if you like writing to meet a deadline. Check it out :)
100 Prompts List-
I've used these lists a couple of times to stir up inspiration in my head, and it's only fair I link back to it. They're pretty inventive prompts too (Y)