Pocket - When you find something you want to view later, put it in Pocket.
TweepsBook - A better bookmarking tool for power Twitter users that you can use to filter, organize and bookmark tweets on your liking.
Instapaper - Instapaper is a simple tool to save web pages for reading later.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
WebSatchel - Copy and save web pages to your own personal archive
Tweetflick - Save, organize & find Tweets to get the most out of Twitter