grid
Color Picker
https://github.com/claviska/jquery-miniColors
Knobs
Alex's
jquery mini colors
http://www.digitalmagicpro.com/jPicker/
Color Picker for Bootstrap - http://www.eyecon.ro/bootstrap-colorpicker/
Adobe Kuler
Illustrator
Illustrator
http://www.eyecon.ro/colorpicker/
farbtastic - http://acko.net/blog/farbtastic-jquery-color-picker-plug-in/
Illustrator
0to255.com
ColourLovers