First of all, I want to state that this is not a full review of TokenBB. It is about my first impression of TokenBB, the DApp powering forums on the Steem ecosystem. Since it is based on my assumptions, it may contain information that isn't accurate. If you find any inaccurate assumptions in my post, consider pointing that out in the comments.
TokenBB entered its public beta a few days ago. I was made aware of this after reading this post by @cryptoctopus. This site is a frontend for Steemit to post forum posts.
The site has a dark theme with a dynamic editor. Forum owner can register their forums in there and general users can post on those forums. Just like all other Steem DApps, you can sign into this app using Steem Connect.
The site has only a few forums that are primarily about its development. Here's a picture of the currently available forums.

If anyone is having trouble logging into it, try whitelisting https://auth.buildteam.io in your cookies section. I block all third party cookies, so the buildteam authorisation cookie wasn't being set.
Hi @littleboy!
Your post was upvoted by @steem-ua, new Steem dApp, using UserAuthority for algorithmic post curation!
Your UA account score is currently 4.144 which ranks you at #3241 across all Steem accounts.
Your rank has dropped 4 places in the last three days (old rank 3237).
In our last Algorithmic Curation Round, consisting of 211 contributions, your post is ranked at #106.
Evaluation of your UA score:
Feel free to join our @steem-ua Discord server