Semantic UI - a toolkit for web UI with semantic layout. Actually looks more semantic and clear (in terms of HTML code) than Bootstrap.
Using Elementary OS 0.3 Freya daily build for two days. Not ideally stable (it is not even beta), but beautiful :) Btw. Beta status could be tracked in http://isfreyareleasedyet.com/.
Semantic UI - a toolkit for web UI with semantic layout. Actually looks more semantic and clear (in terms of HTML code) than Bootstrap.
Hand-picked registry of Node.js frameworks. Makes you a suggestion for mature framework to start with a little easier (according to specific of your needs).
PuPHPet - simple GUI to set up virtual machines Vagrant + Puppet for Web development.
Mobile-Detect - a lightweight PHP class for detecting mobile devices. Works like $detect->isMobile()
etc., very handy for choosing a frontend rendering strategy based on this info.
Official Elasticsearch client library for Node.js and the browser.