WhatRuns is a free technology lookup tool for developers, designers and salespeople to discover the technologies used on any website. Available for free on Chrome and Firefox. Featured 3 years ago.

It’s the latest incarnation of our world-famous Bootstrap theme editor, which makes it extra easy to create your own custom Bootstrap 4.0 template using the built-in HTML editor with live reload. Use all Bootstrap variables, mixins and functions from Sass to create an amazing template.