freeCodeCamp / devdocs

API Documentation Browser

pry / pry

A runtime developer console and IRB alternative with powerful introspection capabilities.

travisjeffery / timecop

A gem providing "time travel", "time freezing", and "time acceleration" capabilities, making it simple to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call.