1. validator.w3.org – the W3C markup validation service
  2. jshint.com – a tool to detect errors and potential problems in JavaScript
  3. fortawesome.github.io/Font-Awesome – the iconic font designed for Bootstrap
  4. stackoverflow.com – the best place to get technology questions answered
  5. scriptsrc.net – the quickest and easiest way to make sure your project always has the latest scripts included