Dribbble Color Palette Generator
Have you ever found some inspiring color palettes on Dribbble, but find it tedious to load them into Sketch? This extension solves exactly that. It allows you to generate a .sketchpalette file from any Dribbble shot, to be later loaded in Sketch.
Swiss style color picker
An online tool to help designers find inspiring color combos. Just load the site, and the Swiss Color Picker will give you a wide range of interesting color combos, arrayed in an abstract geometric pattern of multicolored cubes.
This is a happy little website and free tool that lets you create a gradient background for websites. Besides being a css gradient generator, the site is also chock-full of colorful content about gradients from technical articles to real life gradient examples like Stripe and Instagram.