TweepsBook - A better bookmarking tool for power Twitter users that you can use to filter, organize and bookmark tweets on your liking.
Workona - A better way to work in the browser.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Tweetflick - Save, organize & find Tweets to get the most out of Twitter
Session Buddy - Manage Your Browser Sessions