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.
Linker - Cloud based bookmark manager
Lookmark - Track updates from the apps you've bookmarked on iTunes
Firework - Firework turns web apps into separated and customizable desktop apps which ready to use immediately.
BrainyTab - Bookmark manager that makes you smart(er)