Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
URL Manager Pro - URL Manager Pro for Mac OS, the most powerful bookmark manager for the Mac for use with Safari, Firefox and Chrome
Pocket - When you find something you want to view later, put it in Pocket.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
EverSync - Everhelper - Eversync