NuvioDesktop

NuvioDesktop is the front end of a self-hosted media setup, not the server behind it. It browses metadata, tracks watch progress, manages collections, handles downloads, and plays streams that come from extensions you install or sources you point it at yourself. Kotlin Multiplatform and Compose Multiplatform under the hood, so Windows, macOS, and Linux run the same codebase. GPL-3.0, free, no account.

Installing it is a download, not a deployment. Grab the MSI, DMG, or DEB from Releases and you are done, which is the opposite of the Jellyfin or Plex story where you stand up a server, point it at a library, and tune transcoding. Nothing to index here, because the app is the front end and the sources do the work. Building from source is a single Gradle command if you would rather compile it yourself.

Here is the part the maintainers put in bold at the top of their own README: this is alpha, testers only, expect breaking changes with every update, not suitable for daily use. Take them at their word. Settings, stored data, and compatibility can change without notice. For something you can hand to your household today, jellyfin/jellyfin is the mature answer and it is also completely free.

The catch is what NuvioDesktop deliberately does not ship. It hosts nothing and indexes nothing, so the experience is entirely a function of which extensions you install, and the project explicitly disclaims affiliation with any of them. That puts both the quality question and the legal question on you. Thin clients are portable by design; they are also only as good as whatever is feeding them.