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.

Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting

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.

Uptime Monitor by HetrixTools - Minimize your downtime by being the first to know about it

Update Scanner - Update Scanner is a Firefox extension to monitor web pages for updates.

Inline Checkout - Inline is a fully secure All-in-one Checkout, Upsells, Discounts, and Cart Recovery App for eCommerce - Shopify & WooCommerce