1)   Atomic Watch 1.01
Website Downtime = Lost Revenue Watch your website to ensure you minimize downtime and maximize uptime. If your website is down, search engines may remove your site, partners may remove links to your site, ensure your site is up at all times.

 2)   EXPStudio Bandwidth Monitor 0.95
Monitor network traffic, CPU, and memory usage

 3)   Website Monitoring Expert 4.5.8
Website Monitoring Expert is a multithreaded website monitoring tool, watching different protocols, including HTTP(S), SMTP, POP3, FTP, TCP. It can log the server performance, generate real-time reports, and notify you upon detection of problem or error.

 4)   DocuMonitor 6.5.1
DocuMonitor is a multipurpose Web pages/files, FTP and local files content modification monitor. This product enables you check the changes of the Internet documents manually or automatically and cope with them faster.