http://elm-lang.org is a functional and reactive client-side (js target) language that is still young and getting great very fast. http://pragmaticstudio.com/blog/2014/12/19/getting-started-w... The idea of combining Elm with Elixir or Yesod (Haskell) on the server side seems exciting.

Another interesting project is Snabb Switch. If you want to learn networking at the lowest level and highest speed possible in software, Snabb a great platform for experimentation.

Finally, I'll throw in http://terralang.org. It's not networking related. But, I think it's terribly interesting and not getting any attention.