ColorDev
ColorDev is color picker for Cocoa programmers and UI designers.
It's a simple HSBA interface that renders UIColors with device specific accuracy. The readout includes zero-to-one UIColor values as well as hexadecimal for color matching in your favorite graphics editor.
This app isn't meant to replace the awesome, free Developer Color Picker from Panic's Wade Cosgrove. If you don't have that yet check it out.
Instead it's a handy complement to any UI workflow, with a fast and intuitive interface.
I've used it for a while in my own workflow and thought you all might want to check it out. The custom controls in this app are available on GiHub if you want to check them out too.