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.
Yii2 : to use CamelCase action name in code it should be called with dash in url.
actionViewPost => ?r=index/view-post
Markdown hint : to force a line break (but not a new paragraph) insert 2 spaces in the end of the text line.
Animatron HTML5 animations drag&drop editor. It really shows how HTML5 could be a Flash alternative.
Impressive dynamic page scrolling lib ScrolldJS. Responsive and hign precise positioning.
Help Ubuntu Research Team - fill survey about you mobile phone usage. There is a chance to get a prizes :)