Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Pocket - When you find something you want to view later, put it in Pocket.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
LightShot - The fastest way to take a customizable screenshot.