DevDocs - Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more
The Unsplash API - No-limits, do-what-you-want API for access to 200K+ HD pics.
DASH - DASH is a secure, blockchain-based global financial network which offers private transactions.
PublicAPIs - Explore the largest API directory in the galaxy
Hibernately - Delete inactive contacts from Intercom & MailChimp
API List - A collective list of APIs. Build something.