A community for collaborative character creation and trading, worldbuilding and roleplay. Toyhouse is invite-only and only premium users can give out invites.
You can customize your profile, create an unlimited amount of characters and worlds, upload art and designs, publish literature, and link your characters to other people's characters. Social functions include "bulletins" (announcements posted to your page), forums, and comments on your profile page. People follow you by "subscribing" to you, and you can "authorize" subscribers of your choice, meaning that you allow them to see private characters, bulletins, etc that you've made.
There are comment sections and forums intended for social interaction, but you can choose to turn off all social functions except from authorized subscribers through "quiet mode".
Comments and Reviews
I can definitely recommend checking out Toyhouse, really fun and full of different customization options. Awesome platform.
Forget this website. While it might be the most "popular" OC website, it has absolutely zero moderation. The admin is incompetent and refuses to hire any help and on a website this large that is ridiculously stupid. The website is full of doxxing, harassmnent, stalking, callout posts and generally drama hungry children to the point the website has multiple "drama" blogs just dedicated to talking about the users who use it, often full of nefarious claims to the point many users will admit to feeling on eggshells while being on site. Users have no etiquette and will dogpile you openly if they disagree with you. Tickets raised do not get answered for months at a time - if you're okay with being scammed, having your characters disrespected or stolen or otherwise planning on locking yourself down on "quiet mode" and being a hermit go for it. Quite frankly out of all my years I've never been on a site as badly run or with as many reactionary cruel users.
Toyhouse is interesting but the user registration is a hassle, because you need a invite code. You have to contact a lot of artists just to get a invite code to use the website.
Very useful with lots of options for sorting characters. However, it is invite-only (has been for years) and is rarely ever updated aside from critical security updates. That said, the community on-site is very active, for better or worse; a huge chunk of the userbase likes taking advantage of the (very) slow moderation to harass others over arbitrary reasons, so I recommend keeping all your characters unlisted. This makes them visible only on your profile, and impossible to find using the search feature.