Firefox Advance - Experimental recommendation engine built into Firefox
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Actually Read It Later - Save articles for reading later
Pocket - When you find something you want to view later, put it in Pocket.
ShareIt by SocialPilot - Free Content Curation and Influencer Discovery Tool
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.