Trailblazer is a high-level Architecture libraries for the Ruby web application (not only for Rails). If you are no familiar with it yet - take a 20 minutes walk through guide...
I want to cover once again those places where our team had issues or misunderstanding. Trailblazer documentation got a lot of improvements recently and keep getting more and more care. Some points from this list are covered by the docs, but in practice not everything was smooth.
Very interesting JS plugin for Point of Interest visualisation.
ScrollerJS - lib to make scrollable areas with high performance (also with plugins like Pull to refresh).
Do you like lodash.js or underscore.js ? Then in PHP you definitely need to use bottomline. A set of utility functions to work with arrays, collections and strings.
phpio - PHP class for batch file processing in OOP style.
Facebook guys prepared a Specification for PHP. It looks like after 20 years of development "that awkward moment has come" :) In any case community can't go further for PHPNG, HHVM, Hack etc. without a Spec.