[Deadpikle]

There is one that is .NET and cross platform (incl. Linux) here: https://github.com/NetSparkleUpdater/NetSparkle (disclaimer: I am the primary maintainer of this repository).

For C++, WinSparkle works too: https://github.com/vslavik/winsparkle/

[hermitcrab]

Presumably that means having to install .Net? I guess that makes sense if your software requires .Net, but mine doesn't.