Radar Website Monitor 

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.
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Website Monitoring Expert 

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.
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Netoscope 

Netoscope is a simple and effective tool to monitor Internet services such as web, ftp, or mail servers. When a monitored service fails, Netoscope can notify you about it or even correct the problem if possible.
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IP Monitor 

IP Monitor displays a computer's name and IP address in a window. If notification features are turned on, when the IP address changes, it can be sent to an email address and/or an FTP server to notify of the changes.
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Mailbox Verifier 

Small free software that will notify you about new messages arrived to your mailbox. The number of mailboxes MV can check is unlimited.
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SpamBunker 

A comprehensive 'Install'n forget' PC-sided Spam Deflection System. Virtually 100 percent reliable, without the hassles of updating and/or tweaking comlicated filters. No fuzzy filtering. Notify Ticker, Autopoll...
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