Zeal - Zeal is an API Documentation Browser.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
DevDocs - Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
DASH - DASH is a secure, blockchain-based global financial network which offers private transactions.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community