Pocket - When you find something you want to view later, put it in Pocket.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Workflowy - A better way to organize your mind.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Ghostnote - Add notes to anything.