InstantClick - is a JavaScript library that dramatically speeds up your website, making navigation effectively instant in most cases.

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.