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 many supported destinations you can choose from.
A full-featured screen capture tool, Intuitive image editor, color picker, color palette, pixel-ruler, protractor, crosshair, whiteboard and more.
Instant Eyedropper is a free color detection tool for webmasters that will identify and automatically paste to the clipboard the HTML color code of any pixel on the screen with just a single mouse click.
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.Discontinued
It was last updated in 2013.
Small utility that can show you coordinates and color of any pixel on your screen in different formats (HEX, HTML, RGB, CMYK, HSV). It's staying on top, displays a color of that pixel under mouse cursor, the program can magnify that zone w/ hotkey.
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.