Interesting opensource tools from Facebook

I have to give props to Facebook for opensourcing several of there tools.  A few out of the list that caught my eye are:

Buck: for building small resuable modules in Android

Orgami: A tool to build modern user interfaces

Stetho: debuging tool for android

Infer: static analysis tool for Android/iOS (looks at Objective C, Java, or C code).

http://www.open-electronics.org/top-15-facebook-open-source-projects-you-must-know-and-use-for-your-makers-projects/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+OpenElectronics+%28Open+Electronics%29