InstantClick - is a JavaScript library that dramatically speeds up your website, making navigation effectively instant in most cases.
Note
slavcodev made autoloader extension to use Upper Case namespaces in Yii2. And now if you really mind it - you can use Yii\Web\Controller instead of use yii\web\Controller.
at MobiDev (Kharkiv, Ukraine)
Code in Ruby and Elixir, but still love PHP. Explore ES6 and Vue.js. Explore databases, use Ubuntu and MacOS, think about IT people and management
Notes
SharingButtons - super fast and easy Social Media Sharing Buttons. No JavaScript. No tracking.
Ansistrano- ansistrano.deploy and ansistrano.rollback are Ansible Galaxy roles to easily manage the deployment process for scripting applications such as PHP, Python and Ruby. It's an Ansible port for Capistrano.
ScrollTrigger - JavaScript lib to add scroll based animations to the site with ease.
Learn Enough Command Line to Be Dangerous by Michael Hartl an introduction to the Unix command line. Brief and really informative.