The super fast color schemes generator! The Coolors app allows you to create, save and share perfect color palettes in seconds!
Gradient by ShopFactory is a great tool for finding wonderful gradients, to use in your next project. It allows you to control the gradients based on different settings.
Color palettes generator, ColorSpace is a space for everything that has to do with color palettes and gradients.
A very useful free color wheel and color palette generator for designers and developers. You can also upload an image to get colors from it.