PaletteMaker 

PaletteMaker creates a common 256-colour palette from a list of RGB pictures. It uses an iterative and interactive procedure in order to optimize those colours that you judge most important. PaletteMaker is flexible and achieves high quality.
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Color Detector 

Simply point the mouse cursor anywhere on the screen, and it will tell you: the RGB code, the HTML hex code, and the name of the color in plain english, of the pixel where the mouse is pointing. You can also copy the HTML hex code to the clipboard.
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Absolute Color Picker 

Absolute Color Picker is a freeware enhanced color selection dialog with RGB and HSB color models. Unique color selection dialog models provide versatile color schemes for selecting necessary color hue, brightness and transparency values.
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RGBPro 

RGBPro is the color picker for everyone. With RGB and CMY color models, 6 hex color formats, HTML & CSS codes, Color Grabber, 10 palettes and a save & restore favorites you can create the color you want. All in a user friendly interface.
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Systweak Photo Studio 

Apply impressive effects, group to your requirements, supports batch conversion, acquire images from a TWAIN device, adjust levels, gamma, RGB curves, hue/saturation, brightness/contrast and much more.
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RGB Editor 2000 

RGB Editor is a small utility useful for selecting and creating RGB colors for graphics projects. The values of the red, green and blue components are displayed and easily transferred to your source code files. Custom colors can be defined and saved.
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