There's plenty of cool and some rather novel groups for the fan fiction community. Here's a few of them!
A collection of quality stories.
If someone has ever illustrated one of your stories, this is the place to show it off.
A collaborative group between writers and artists for the Lord of the Rings fandom.
Like the above, but for all fan fiction!
And some general groups:
If you know of any more cool groups, let me know!