I hope it's ok to post this here, apologies if this is frowned upon. For anyone who might be interested, I've written 2 open source projects to use Xtend in my work, which is Android app development and some web backends. I now get to work in Xtend on both the client (Android) side and on the server (web backend) side and find that it boosts my productivity and developer happiness :-)
Xtendroid is a library project for Android development, see:
https://github.com/tobykurien/xtendroidSparkler is a Rails-inspired web framework (with the goal of being high-performance):
https://github.com/tobykurien/sparklerDetails and examples are at the linked sites. Feedback and contributions welcome :)
Toby.