KWatch.io - Monitor Keywords on Reddit, Twitter, Linkedin, Quora, Facebook, and Hacker News. Receive an instant alert when specific keywords appear on social media.
Visualping - Visualping is the easiest to use website checker, webpage change monitoring, website change detector and website change alert software of the web. Read more about Visualping.
F5Bot - F5Bot will send you an email whenever your brand, product, or keyword is mentioned online.
Distill Web Monitor - Distill is a web monitoring tool. It can monitor RSS feeds, a webpage or a part of webpage. Alerts in the form of pop-up, audio or emails can be received.
Syften - Better social media keyword alerts
Wachete - Track web page changes and get notified. Free Sign-up. Have all data in one place