F5Bot - F5Bot will send you an email whenever your brand, product, or keyword is mentioned online.
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KWatch.io - Monitor Keywords on Reddit, Twitter, Linkedin, Quora, Facebook, and Hacker News. Receive an instant alert when specific keywords appear on social media.
Startup Stash - A curated directory of 400 resources & tools for startups
Syften - Better social media keyword alerts
Makerbook - A directory of the best free resources for creatives