PingCOPA, aids network monitoring and diagnosis. PingCOPA installs on all 32 bit Microsoft Windows operating systems (except 95). Speech is only available on systems with the Microsoft Text-to-speech engine installed. PingCOPA allows simultaneous multiple ping and traceroute sessions. Emails, speech and file logging can be generated at regular intervals or when a connection state changes using the powerful alarm and snapshot facilities.
linkFerret
Monitor your network traffic, display frames in brief, hex and detail windows, create reports, filter protocols, create link filters, and more. Filter based on protocol or link masks. Currently decodes 27 protocols now with 802.11 wireless planned.
LanTopolog
Provides automatic physical network topology discovery, network map visualization, detailed and searchable physical network topology map, monitoring device's state in real-time, ability to auto-discovery new devices, web browser-based access
Free HTTP Sniffer
If you need a tool to capture and view all communications over the HTTP protocol then Free HTTP Sniffer is a program for you. It's a handy tool that allows you to monitor HTTP traffic in real-time to find the URLs for all streams on your LAN.
Alchemy Network Monitor PRO
Alchemy Network Monitor monitors your network servers and business-critical applications availability and performance and immediately alerts you if a server gets out of order.
IsItUp
Taro Software's IsItUp - When you need to know the status of your network. IsItUp monitors network IP devices, email servers, & websites around the clock and alerts you via email/pager when it goes down and comes back up! Performance Statistics kept.