gpick!

ShareX is a free and open source program that lets you capture or record any area of your screen and share it with a single press of a key. It also allows uploading images, text or other types of files to over 80 supported destinations you can choose from.

Free color picker and color mixing tool, including harmonious colors finder, RGB and RYB colour wheels, gradient and code to colour conversion

Identifying the color code of an object on the screen is usually an involved, multistep process: You press the Print Screen key to copy a screenshot to the clipboard, load a graphics-editing program, create a new file, paste the screenshot from the clipboard, zoom in on the object, use the "Pick Color" tool, and finally copy the HTML code of the color to the clipboard.

ColorZilla is an extension for Mozilla Firefox and the Mozilla Suite.

Color Cop is a multi-purpose color picker for web designers and programmers. It features an eyedropper, magnifier, variable magnification levels, 3 by 3 and 5 by 5 average sampling, snap to websafe, color history, and a 42 color complementary palette. Color Cop will convert RGB decimal values to Hexadecimal color codes. It has color code support for HTML Hex, Delphi Hex, PowerBuilder, Visual Basic Hex, and Visual C++ Hex. Color Cop is a multi-purpose color picker for windows.

Colormania is an advanced color picker utility, especially created for web-designers, graphic artists and application developers.

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.

Imaging is a Collection of Image Related Tools (Image Viewer, Image Converter, Image Resizer, Image Optimizer, etc).

KColorChooser is a simple application to select the color from the screen or from a pallete.

ColorMixer is a powerful application for mixing colors. You choose a color and ColorMixer will calculate 8 harmonic colors based on the one you’ve chosen. It’s user interface offers lots of utilities to choose colors.

With the pipette you are able to edit, convert and pick up colors from your screen. Pipette also supports a lot of standards or color models (RGB, CMY, CMYK, HSV, TColor and XYZ0). Color models are nothing but theoretical descriptions of colors using certain numeric values. You can build your own shades and tones by changing the color values. All color models automatically change to reflect the new values. Copy the value to the clipboard with a single click on the Copy icon.