I found out about a really cool project recently. It's called Redox OS, it's an operating system written primarily in Rust and is currently in active development. It has a minimalist desktop environment that doesn't look ugly (and infact is usable - I haven't tested out this OS myself but from the looks the desktop environment looks usable). It's still in its infancy - like a lot. But You can get an image from their site and download it and take it for a run.
Here is the Redox OS Project Site.