TCP Spy .NET is a small software used to trace TCP packets between a client and a server. Optimized for .NET Web Services or Web Site TCP Spy .NET will help you find any bottleneck and it will help you in analyzing your bandwidth usage. With TCP Spy .NET, you can inspect data in different views, track server calls or just redirect the host.

Its a 4 in 1 tool:
1. monitoring tool
2. web service / web site profiling tool
3. redirection server
4. Network / Web Site / Web Services spy

Features - Standard Edition
1. General
* Light and easy to deploy (one executable only)
* Small (less than 2 meg)
* Rich and easy user interface
* Auto update
* Compatible with Windows XP/2k3/Vista
* Free

2. Monitoring
* Monitor connection IP address
* Monitor connection destination
* Monitor opened connection
* Log connections and requests to file
* Suspend monitoring with no service interruption
* Flag connection / request for an easier tracking
* Insert grid marker for an easier tracking
* View and clear log file

3. Profiling
* Profile Web Service: calls, durations, bytes in, bytes out
* Profile Url: content, size
* Get stats about Web Service (calls, duration, bytes in, bytes out)
* Get stats about Url (calls, duration, bytes in, bytes out)
* Pause profiling without interrupting the communication
* Get the size and the duration of the each request
* View request details for each connections
* Summary request view

4. Redirection server
* Configure port redirection
* Configure ip redirection

5. Network spy
* Inspect bytes in / request data
* Inspect bytes out / response data
* Inspect header and raw data
* View HTTP header

Features - Professional Edition
1. Hex data view
2. Decompressed data view with supoprt of gzip and deflate
3. Xml data view
4. Image data view
5. Content data view
6. Summary connection view
7. Syntax highlight in content view with support for CSS, Html and Javascript
8. Statistic view with chart grouped by Web Service, by content or by url
9. Trigger notification for unexpected data size or duration
10. Run in the tray icon
11. Tray icon balloon for trigger notification
12. Save and load profiled session
13. Compare profiled session
14. Resend to server received request
15. View all connections, active connections or detailled requests

The license of this software is Free Trial Software, the price is $49.99, you can free download and get a free trial.