Here's a few sandbox comms. I don't own them but I've been having some fun there and I asked the mods if I could share:
6wordstories - A post of six words to start a thread or a net post for anyone to tag.
smutty6ws - The smutty version of Six Words. Please read the rule before applying. We do check to see if the journal is a character journal and the mun and muse is 18+ on the user info.
sceneandsay - A community that doesn't limit your first post, say anything you'd like.
sceneandsaysmut - A Smutty community that doesn't limit your first post. Please read the rule before applying. We do check to see if the journal is a character journal and the mun and muse is 18+ on the user info.
muses_wanted - A community where you can pimp for muses wanted.
replytomymeme - A community to meme's geared toward your muses and a bi-monthly How Am I Driving Meme for players can talk OOC about how they are portraying their muses. New Prompt has been posted.
Lastly we have promptme - a new prompt community with monthly prompts. November post is live!