This is a jquery plugin which are able to generate CSS gradient lengthy script. This tool was meant to be used by theme designer who want to incorporate customizable CSS gradient within their theme. It's built using jQuery UI and jQuery Colorpicker.
Github page: https://github.com/emkamal/Spectral-Jquery-Gradient-Generator
Demo page: http://kamalabs.com/Spectral-Jquery-Gradient-Generator/