Free in use software for windows

Hidden Menu is the perfect answer to your need to launch programs. When Hidden Menu is not in use it is invisible, saving your valuable desktop space. When you move your mouse to any edge or corner of your screen, it pops up, allowing you to launch your programs, files and shortcuts. (New version allows you launch program by hotkey) Hidden Menu is very easy to manage, and it uses a tiny amount of system resources. You will soon find that it is the very best way to launch programs!

Clear the Temporary Internet Files Cache and/or the TEMP files folder ICSWEEP is simple command-line tool that was designed to clear the Temporary Internet Files Cache and/or the TEMP files folder of ALL user profiles that are NOT in use when this command is executed.
This utility was written for the purpose of allowing a SINGLE command to identify and clear Temporary Internet Files Cache and/ or TEMP files of ALL user profiles currently NOT in use.
This tool could be simply run from the command line at any time, or added
as a SCHEDULED TASK for regular cleaning of user profiles, reducing the
overall size of a profile and saving disk space for locally based profiles.
ICSWEEP will only function when executed by a user with ADMIN rights to the
profile directory.

APSW Watt-U-Use - just how much money that light left on all night costs? Or that stereo that just seems to never stop playing from the kids room? How about which of your household appliances contribute the most to your monthly energy bills?
Stop wondering! Watt-U-Use has the answer to those endless arguments about whos using what and when. Our Watt-U-Use home energy calculator can show you the costs of running a variety of household appliances, so you can save $$$ on your next utility bills.
Main features:
- Calculates by any two of wattage, voltage, amperage.
- Shows a comparison between the least and most expensive appliance.
- Calculates cost per hour and cost per day for each appliance.
- Calculates an estimate for the next utility bill.
- Shows your estimated energy bill for the month, quarter and year.
- Lets you add any appliance (lights, stereo, washing machine etc).
- Allows for any discounts or rebates on energy bills.
- Calculates kilowatt hourly charge rates.
- View, save and print report features.
- Help features using built-in web form.
- Fully customized with new, insert, edit and save functions.
Version restrictions:
- 30 days limitation

SkinBench is a benchmarking application that will use standard Windows API calls with regular windows and window controls (edit boxes, buttons, etc) to evaluate the performance of any skin in use (it will still work without any skin... probably faster.
The idea is that, since it does things a user does (activating windows, moving them around, etc) it should reflect how fast a skin will appear to a user. Obviously, on their own, the numbers mean nothing, so you might want to see how some of the default skins score on your computer for comparison.