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.
The super fast color schemes generator! The Coolors app allows you to create, save and share perfect color palettes in seconds!
uiGradients is a community contributed collection of beautiful multi-color gradients, free to use on your next UI or design project.
Dribbble Color is a wonderful tool that allows you to display all dribbble shots, based on certain colors.