Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Dustman - Firefox extension to close unused tabs.
Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
Tab Wrangler - Automatically closes inactive browser tabs
Pocket - When you find something you want to view later, put it in Pocket.
Symgi - Symgi - New minimal and pure bookmark site. Open multiple or singular links from bookmark groups.