Free gather information software for windows

LeeT Network Information 1 is a useful and easy-to-use software for Windows XP only, that gathers information about your personal computer and your network at very fast speeds. It grabs your operating system, serial number, operating system version, memory chip/s, CPU type, CPU clock speed, LAN address, WAN address, subnet mask, & MAC address. This is a very handy tool for network administrators. It's quick and easy to use. With one click of a button you have all this information.

Personal Computer System Information - tool to gather the most important information about your PC Personal Computer System Information is a free and useful utility for those who want to gather the most important information about their personal computer.
Personal Computer System Information displays important information such as the CPU Speed, MAC Address, Ports, Memory (RAM), Disk Space, Video Card, Windows version, and applications installed. You can then save this information and import it into other applications such as an Excel spreadsheet.
Personal Computer System Information is free, and the source code is available for purchase.
System requirements:
- .NET Framework 1.1
Enhancements:
- This is the initial release of Personal Computer System Information

The Freeware SIW is a System Information tool that gathers detailed information about your system properties and settings. A utility that includes detailed specs for Motherboard, BIOS, CPU, Devices, Memory, Video, Drives, Ports, Printers. It displays information about Operating System, Installed Programs, Processes, Services, Product Key (CD key), Serial Numbers, Users, Open Files, System uptime, Users, Network, Network Shares, and more, as well as real-time monitors for CPU, Memory, Page File usage and network traffic. SIW also displays currently active network connections, Passwords hidden behind asterisks, installed codecs, and more. A standalone tool that does not require installation.

Qt Network Monitor is built in C++ and uses the underlying library libpcap / WinPcap to gather information about the network traffic. The GUI is built in QT and faily independent from the implementation of the device listener.
Qt Network Monitor is a open source bandwidth monitor written using Qt and LibScp/WinScp. Works well under Linux too though you have to compile it yourself.The application allows to monitor a device. You start the program, chose a device and put the application to the tray. You can then know how much bandwidth you are taking at any time.