Zzoom is described as 'A free screen zoomer, color picker and image grabber, all in one!' and is an app in the Photos & Graphics category. There are more than 10 alternatives to Zzoom for a variety of platforms, including Windows, Mac, Linux, iPhone and iPad. The best alternative is gpick, which is both free and Open Source. Other great apps like Zzoom are gcolor2 (Free, Open Source), Meazure (Free, Open Source), Colora (Free, Open Source) and Magnifixer (Free).
gcolor2 is a basic colourpicker utility that allows you to select any colour on your screen, and, well, grab it's colour. It also allows you to save the colour you create to a file, which shows up as a list in the application.
What are the dimensions of that image? How big is this window? Does this layout fit on an NTSC display? What color are these pixels? What does this icon look like close up? How can I capture an arbitrary portion of the screen?
Magnifixer is a screen magnifier utility. You can place it anywhere on your screen, make it any size you want and select a zoom level. Magnifixer will always show the area of your screen where the mouse cursor resides.
Ever tried using a color picker on a high resolution monitor? Its impossible. Thats why this color picker has a magnifier attached. Grab palettes of up to 16 colors at once and use four advanced color mixers to select a spectrum of possibilities.
ColorMania is a colorpicker for Windows. It's the perfect solution for previewing, identifying, testing and organizing color values. It can be a very difficult job to get your colors right for a unique or appealing design.
Pixel Pick is a free color picker tool that pick the pixels color under your mouse cursor on the desktop and translates it into a number of different color formats such as RGB, CMYK, HSB, HEX or Web Color format. A free color picker for grabbing color under your mouse .