Double Shot #1634

OneOps - Open-source cloud management product from WalMart, of all darned people.
Finding iOS Memory Leaks with XCode's Instruments - Xcode is one of the worst development environments I've ever had to work with. Instruments is just as bad, but you gotta know how to use it.
Two Factor Authentication in Rails 4 with Devise, Authy and Puppies - Just in case you need that little bit of extra security.