Debuggex is a very well done and useful site. It reminds me of http://www.colorzilla.com/gradient-editor/ http://www.colorzilla.com/gradient-editor/ in terms o

Debuggex is a very well done and useful site. It reminds me of http://www.colorzilla.com/gradient-editor/ http://www.colorzilla.com/gradient-editor/ in terms of utility and slickness of design. Alex Sirota of that site uses a sponsored area that is not obtrusive.