Ladybird is an ongoing project to build an independent web browser from scratch.
It is being developed as part of the SerenityOS/serenity project on GitHub.
There are no downloadable binaries yet, as the project is still very unstable. You can follow the build instructions to build it for yourself.
This page is not fancy because we are focusing on building the browser. :^)
Since Ladybird is part of the SerenityOS project, development is coordinated on the SerenityOS discord server.
A few other platforms like Forgejo (Codeberg), GitLab, & SourceHut? The first 3 open source/open core Git forges I looked up support this… it is not unique to the Microsoft-owned, proprietary offering.