API List - A collective list of APIs. Build something.
The Unsplash API - No-limits, do-what-you-want API for access to 200K+ HD pics.
Abstract APIs - Simple, powerful APIs for everyday dev tasks
Mocklets - A HTTP-based API simulator to assist parallel development 🛠️
Phantombuster - A marketplace of simple to use no-code APIs
TelstraDev - Telstra's home for all things API and developer