ReadMe on Intercom - Let your users search your API docs from the Intercom widget
PublicAPIs - Explore the largest API directory in the galaxy
The Documentation Compendium - Beautiful README templates that people want to read.
Mocklets - A HTTP-based API simulator to assist parallel development 🛠️
DevDocs - Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more
Airbnb Official API - Develop your application for millions of travelers & hosts