Applications assessment

I'd like to get an idea of what applications are traversing my network. What free or cost effective tools can I use to perform my application assessment, excluding Wireshark?
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leblancAccountingAsked:
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jerseysamConnect With a Mentor Commented:
There is a site that has a poweshell script you can download.

It might not be quite the right thing but would give you a list of applications installed on PC's on the network. Might be handy?

http://windowsitpro.com/powershell/what-applications-are-installed-computers-your-network
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giltjrConnect With a Mentor Commented:
Wireshark can't really tell you what "applications" are using your network.  By looking at what TCP/UDP ports numbers are being used you might be able to guess what "functions" are being used.

Example:

Using Wireshark you could see that somebody access a server on your network with the destination port of 80.  You can look at the traffic and see that it is HTTP, but you don't know if the server is IIS, Apache, WebSphere, Sharepoint, or any other web server that listens on port 80.  All you know is you have a "web server" on your network.
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