GitLab seems to be on fire in terms of product development. I'm truly inspired by the "transparent by default" business policies and commitment to openness.
Since I'm interested in highly concurrent web services I thought it was interesting they are underway porting their http server from Ruby's Unicorn to Golang. It would be nice to see a separate post on this process and any performance comparisons.
Checking out the source code[1] I noticed how nice and full featured the GitLab UI. As a daily GitHub user I was pleasantly surprised by how comfortable I was navigating around.