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Hacker News Front Page Explorer - A database of top ranking Hacker News front page posts
Talkwalker Alerts - Better than Google Alerts
Hacker News-cli - Browse Hacker News from your Terminal
Clatters - iOS app to monitor your brand on Social Media
Hacker Newsletter - Best of Hacker News in your inbox every Friday.
Intutel - Intutel is a market intelligence cloud - a suite of monitoring & analytics tools to help brands/ marketers / market research companies