Free utility software for windows

RMClock (formerly known as AMD64CLK) is a simple GUI utility designed for realtime CPU frequency monitoring and realtime adjustment of the CPU multiplier (FID) and voltage level (VID) of the supported CPUs via processors power management model specific registers (MSRs).
In auto-management mode it continuously monitors the CPU usage level (reported by CPU itself) and adjusts the CPU frequency and/or voltage level as required.
Enhancements:
- New UI and popup menu design, including animated icon feature.
- Support for mobile/low-power desktop AMD Athlon XP CPUs featuring AMD
- PowerNow! technology.
- Improved FID/VID control logic.
- Additional stabilization-related tweaks.
- Additional CPU-specific tweaks for AMD Athlon 64 and Athlon XP family CPUs.
- Bugfixed Restore Defaults on Exit.
Processors:
- AMD Athlon 64/FX, mobile Athlon 64 featuring AMD Cool`nQuiet technology.
- Mobile or Low-Power Desktop AMD Athlon XP featuring AMD PowerNow! technology.
The presence of these features is automatically detected at the program startup.

When using a DNS Server under Windows NT, hosting a large quantity of domain names, the zonefile folder tends to get a little out of hand, and rather unmanageable. DNS Utility, basically eases the process of editing and maintaining your zonefiles. It does this simply by opening the appropriate zonefile according to the domain name you have entered into the interface. You can also add new zonefiles, which will be created using a template file of your choice. A new feature in this version allows you to store up to 6 favorites, so you dont have to keep remembering the zonefile name for your in-arpa addresses.

EncryptDecrypt File Utility is a simple application to encrypt and decrypt a file EncryptDecrypt File Utility is a simple application to encrypt and decrypt a file. It uses a password that you specify to decrypt or encrypt a file.
It supports any file type and any size file. It offers a simple layer of protection against someone reading your files or running your programs.

Shutdown, reboot or logoff your computer quickly with Shutdown Utility Shutdown Utility enables you to shutdown your computer with the push of a button. You can have the program shutdown, logoff, poweroff, or reboot your pc.
The functions can be executed by launching the program directly and the pushing the appropriate button, by using command line switches, or with shortcuts. Four shortcuts are included for the three actions.
Command Line Switches:
/logoff - Logs off the current user
/shutdown - Shuts down the pc
/reboot - Reboots the pc
/poweroff - Shuts down and powers of the pc

Domain Change Configuration Utility is a free and useful utility that will come in handy.