Ethereum Syllabus - A complete Ethereum learning track, packed with resources
Opta - Opta is a new kind of Infrastructure-As-Code framework designed for fast moving startups.
Ethereum Price - ETH live price + updates from the industry
Chain - The Block Chain API for Developers
Pragma - The home base for Ethereum developers.
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.