Bandwidth Monitor 

Bandwidth Monitor tracks all network connections traffic and displays real-time graphical and numerical data transfer rates. It can display multiple connections rates at the same time. Bandwidth Monitor works with all types of network connections.
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SiteMonNak 

SiteMonNak can monitor and report on the status of a variety of items related to the accessibility of web sites. What is monitored is highly flexible. When a problem is detected you can be informed in a variety of different ways, sound, email etc.
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WebScout 

WebScout is a powerful HTTP and SOCKS 5 proxy which can share, monitor and filter Internet access. The intuitive user interface makes it simple to create access rules controlling what activity should be blocked.
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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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NetStatus 

NetStatus is a monitoring application designed to monitor anywhere from 1 to 50 servers or devices on a network. Tests include HTTP, FTP, Telnet, Ping, Disk Space, NT Service Status, POP3, SMTP and more.
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NetStatus Professional 

NetStatus Pro is a monitoring application designed to monitor anywhere from 1 to 250 servers or devices on a network. Tests include HTTP, FTP, Telnet, Ping, Disk Space, Event Log, File Exists, NT Service Status, Performance Monitor and more.
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