Some tips how to keep up with your developers skills through contributing to Open Source projects.
http://abdullin.com/post/contributing-to-open-source-is-so-much-better-than-taking-a/
http://abdullin.com/post/10-steps-to-become-better-net-developer/
http://microsoft.github.io/
http://www.rackspace.com/blog/a-net-developers-guide-to-the-world-of-open-source/
