Refined Twitter - A browser extension that improves the Twitter experience
PublicAPIs - Explore the largest API directory in the galaxy
Typefully - Write & publish great tweets, without distractions
The Unsplash API - No-limits, do-what-you-want API for access to 200K+ HD pics.
Thread Creator - The best way to create and schedule Twitter threads
API List - A collective list of APIs. Build something.