A repository that contains multiple packages or projects. Those projects can, but don't have to be related.
You may also be interested in ...
Enhance
Enhance is a web standards-based HTML framework. It’s designed to provide a dependable foundation for building lightweight, flexible, and future-proof web applications.
:nth Tester
Online and visually :nth css tester made by CSSTricks.
HTML Reference
HTML Reference.io is a free guide to HTML. It features all elements and attributes.