Free network testing software for windows

This program makes backup copies of selected files (when they are changed or created) and directories keeping the original directory structure. It is intended to run at startup. The files are not only copied and left at the destination directory but they are mirrored, meaning that when a file is deleted a backup copy is also deleted but not immediately. The deletion is delayed for a number of executions which can be configured. The destination directory should be at a second disk or a network drive (doesnt have to be mapped).
Requires .net framework
Configuration
The following options can be configured:
# thread priority (should be low so the system doesnt become slow) there might be problems with some settings under Win98/ME
# number of executions before deletion
# silent operation (the form doesnt show)
# destination directory
# network drive credentials (stored in clear text !)
# directories to backup
# directories to exclude
# extensions to backup/exclude
Bugs
It is possible (even probable :) that the program still contains some bugs so feel free to report them as well as any suggestions.
This was written as a project for one exam at a faculty (not an important one) so its not perfect. I wish that it was some Linux exam but it wasnt :( It was also written as a result of my frustration after i spent a week googeling for a backup program and everything I found was eating up resources like hell and it just copied files and didnt delete them at the destination so it made a big mess.

Network Catcher, from Shunra Software, is a free network monitoring tool that records and displays latency and packet loss between your PC and any internet site. Use this freeware tool to monitor the quality of your network link. You can save all your recordings and send it to another user via email.
Network Catcher also integrates with Shunras network simulation technology, enabling you to capture and import production conditions directly into network simulation scenarios and test applications under real-life network conditions. Network Catchers production network recordings are also ideal for baselining the performance of the production network, including best case, worst case and average application performance - giving you a great starting point from which to make informed decisions on performance limitations and expectations for new or existing applications that are about to be deployed over the network.
Using production network parameters is ideal for testing applications when the target network already exists, such as a companys corporate network or a customers network. However, if the target network has not yet been designed or built out, you can record a variety of different production networks and create a library of production network conditions which you can then use to test your applications and ensure that that they meet performance expectations in any potential network environment.