I suspect most everyone here has heard of Dribbble. However, I don’t use it for anything or have an account there.
My impression from, admittedly, several years ago was that it was a place for hobbyists, amateur illustrators and students to show off their work to their peers — sort of like DeviantArt. Maybe it’s changed or maybe I just dismissed it too easily.
I have little interest in attracting followers, though, like it’s a contest of some sort between designers. So that’s an immediate turn-off for me. Browsing through their freelance job posts, it all appears to be bottom feeder leads, like designing people’s Facebook banners and self-published book covers.
I’ll need to take a closer look.