Raindrop.io - All your articles, photos, video & content from web & apps in one place.
TweepsBook - A better bookmarking tool for power Twitter users that you can use to filter, organize and bookmark tweets on your liking.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Lookmark - Track updates from the apps you've bookmarked on iTunes
Tweetflick - Save, organize & find Tweets to get the most out of Twitter
Firework - Firework turns web apps into separated and customizable desktop apps which ready to use immediately.