Calq is a free, lightweight, shortcut-key accessible calculator for both Mac OS X 10.4+ and Windows 2000/XP. The idea is to give you quick access to math functions without launching another program just to do simple calculations.Calq can run in your Mac menubar or Windows tray, but you can just have the program run in the background with no icons. You can select a hotkey to launch the calculator, and when you press that hotkey, the Calq window displays for you to enter your calculations.
The program has a few customizable options besides the hotkey combination like screen location of the calculator window, fade effect, and transparency.
[Via MacUpdate]
