PublicAPIs - Explore the largest API directory in the galaxy
Airbnb Official API - Develop your application for millions of travelers & hosts
API List - A collective list of APIs. Build something.
TelstraDev - Telstra's home for all things API and developer
API for Product Managers - The A to Z of APIs for product managers
Airbnb Experiences - Airbnb expands beyond rentals — now hosting Experiences