Just Color Picker - Free portable colour picker and colour editor for web designers, photographers, graphic designers and digital artists. Supports Windows and macOS.
RNI Films - Real film filters for iPhone photographers
Instant Eyedropper - Identifying the color code of an object on the screen is usually an involved, multistep process:...
Argentum Camera - A monochrome camera with beautiful effects
gcolor2 - GTK+2 Color Selector
Camera Noir - The most powerful black & white photo editor