Mbin is a decentralized content aggregator, voting, discussion and microblogging platform running on the fediverse network. It can communicate with many other ActivityPub services, including Kbin, Mastodon, Lemmy, Pleroma, Peertube. It is an open source alternative to other link aggregator services like Reddit. The initiative aims to promote a free and open internet.
Mbin is focused on what the community wants, pull requests can be merged by any repo owner (with merge rights in GitHub). Discussions take place on Matrix then consensus has to be reached by the community. If approved by the community, only one approval on the PR is required by one of the Mbin maintainers. It’s built entirely on trust.
It seems it’s claim to fame is being more open and accepting of community changes and improvements. It can install as either bare metal/VM or as a Docker container.
Although anyone can install it and self-host it, their project page also contains a link to various instances that already exist and which anyone can register on.