1)   IsItUp Network Monitor 6.31
IsItUp Network Monitor is a server, website, port, and email system monitor. It monitors multiple IP devices, websites, servers and ports with alerts via email or pager; graphs. Web content check; performance stats and error log, runs as a service.

 2)   Radar Website Monitor 4.6.1.7
Radar Website Monitor 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.

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

 4)   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.

 5)   DocuMonitor 7.0.1
DocuMonitor is a multipurpose Web site contents and availability monitor that enables you to check the changes of the Internet documents automatically and cope with them faster.

 6)   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.

 7)   ServerRadar Server Monitor 5.1.1.3
ServerRadar is a powerful and easy to use website monitoring software. It can monitoring your website, mail server, ftp server, Database server and DNS server. Immediate notification in the event of server errors and HTML reports are also available.

 8)   UpdatePatrol - A Website watcher 2.1
Select which web sites to watch, and how often you want these web pages searched. The program will work silently in the background, and notify you when there are changes to the selected sites or blogs. View the sites with changes highlighted.