ColorSpace have set themselves the task to create a place where you can find matching colors, generate nice color palettes and learn more about color conversions and meaning. Sometimes it is hard to find inspiration for a good color scheme or you do not have the time to experiment until you find matching colors.
Their collection of tools has just been released and is currently in beta. At the moment, you can generate color palettes or create nice CSS gradients from colors of your choice.
Dribbble Color is a wonderful tool that allows you to display all dribbble shots, based on certain colors.
A great tool that generates linear gradients, with the ability to customize each gradient, and download the CSS gradient code.
Color Hunt is a free and open platform for color inspiration with thousands of trendy hand-picked color palettes.