A Rust binding of the wxWidgets cross platform toolkit.

I don't know. I haven't checked. Have you checked yet since posting?

Well, don't know exactly but it's obvious that wxWidgets came to a point where they are now developing some rust..

Sorry.

Even if not the most up-to-date, it's still nice to have an option to create some GUI stuff in Rust.

wxc is now part of the wxHaskell project [http://www.haskell.org/haskellwiki/WxHaskell], which has this to say about up-to-dateness:

The core interface of wxHaskell was originally derived from the wxEiffel binding. Work on this has been dormant for several years, but the wxHaskell maintainers now support updates to the wxWidgets API themselves - we generally respond to new releases of wxWidgets within a few weeks at most.