Statsignal - Statsignal is a simple and cost-effective way to monitor your website or server and publish a status page of your system.
Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.
OnlineOrNot - Uptime monitoring for software teams (even teams of one).
Burp Suite - Burp Suite is an integrated platform for performing security testing of web applications.
Site monitoring - Free open-source website monitoring software, easy to set up and use for monitoring web sites.
OpenVAS - The Open Vulnerability Assessment System (OpenVAS) is a framework of several services and tools...