ScreenTray - A better way to capture, annotate and share screenshots
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Annotate by Convergely - Easily annotate images you get on Slack - just like Skitch
Pocket - When you find something you want to view later, put it in Pocket.
Weava - Workspace to highlight, organize & collaborate on your research articles.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community