This project blew me away. I always thought Scheme was just interpreters and toy programs. Hope this succeeds in making scheme popular. Scheme and Lisps in general way too underrated.
Recently I have to give huge props to Guile + Andy Wingo for guile-fibers. It's proper concurrency, using delimited continuations in scheme. Just frickin' fantastic!
I've actually written some LambdaNative. Unfortunately, we ended up going with Cordova, but you can guess which one was more fun to write.