Defelo

I've been using https://radicle.xyz/ + https://radicle-ci.liw.fi/ (in combination with my own ci adapter for nix flakes) for about half a year now for (almost) all my public and private repos and so far I really like it.

Yes, there is: https://app.radicle.xyz/nodes/seed.radicle.xyz/rad:z4V1sjrXq... This is the full web app powering https://app.radicle.xyz/ including radicle-httpd which simply serves an http api used by the radicle-explorer frontend and which can also be used as a (readonly) git remote.

There is https://search.radicle.xyz/ if you want to search for public repos. But I don't know whether the home page links to it somewhere.

I don't know about previous versions, but afaik since the release of the current heartwood implementation it is neither based on a blockchain nor does it include any "crypto" stuff. If it did, I probably wouldn't be using it.