Bootstrap
Bootstrap is a CSS/JS toolkit that was started in 2011 by Mark Otto and Jacob Thornton. It powers many websites, including CollabVM's webapp! (It uses Bootstrap 5. The old webapp uses Bootstrap 3.3.7). The current release as of 5-18-2022 is 5.2.0-beta1, This page will help you get started with Bootstrap, create a basic template with it and more.