Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Pocket - When you find something you want to view later, put it in Pocket.
Lookmark - Track updates from the apps you've bookmarked on iTunes
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Firework - Firework turns web apps into separated and customizable desktop apps which ready to use immediately.