Talkwalker Alerts - Better than Google Alerts
TweepsBook - A better bookmarking tool for power Twitter users that you can use to filter, organize and bookmark tweets on your liking.
Syften - Better social media keyword alerts
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
SOCIALHOSE.IO - Discover an enterprise social listening platform that enables brands & agencies to monitor the web & listen to their audience, built to scale. Start for free!
Tweetflick - Save, organize & find Tweets to get the most out of Twitter