Only other forum I'm active in is Serebii, though in their fanfiction section. I love that we're now helping each other out with each other's writings instead of just caring about our own, and I hope to change that behavior with my own section too.
I did recently signed up to Court Records, which is an Ace Attorney forum, but I haven't posted there all that much. I joined as I started writing Ace Attorney fics now and I hope to get myself out there, but real life got hectic and I don't have much time to dedicate myself for that forum.