The end-user deployment is open source
The end-user deployment, the piece Febris calls the node, is open source. It was always free to run. Now the source is public too, and a group that wants one can host it themselves with their own content. The reasoning is on the about page.
What is actually published
The node itself, and both simulation SDKs. The C# SDK is on nuget.org, the C++ SDK ships as a release zip and through a vcpkg registry, and the two produce byte-identical output at the same version so a mixed estate stays consistent.
What is not published yet
The Windows client suite and the Android pair. The node's distribution surface works and this site reads directly from the same feed the node does, so the moment those clients are published the download cards here fill in on their own. Until then the cards say plainly that they are not published rather than hiding the row.
Honest caveats
This is pre-1.0 and there is one maintainer, so expect slow review and no on-call. Interfaces can still change before 1.0, including configuration keys and API routes, and there is no long-term-support branch. Upgrades run migrations at startup with no downgrade path yet, so take a database backup first. The test suites are green and ship in the repository, which makes them the honest measure of what is actually pinned rather than a claim you have to take on trust.