CSSGradient.io - As a free css gradient generator tool, this website lets you create a colorful gradient background for your website, blog, or social media profile.
Stylizer - A productivity-focused real-time CSS editor for serious web developers. Mac OS X and Windows.
Color Palette Generator - Enter the URL of an image and find its color palette
EnjoyCSS - CSS generator for rich graphical styles without coding
Klart.io Colors - A data-driven collection of beautiful color palettes 🌈
Rapid CSS Editor - Rapid CSS editor is quick, powerful and easy to use HTML and CSS code editor for web developers. Intuitive interface and intelligent features help you become more productive and create modern HTML5 and CSS3 based websites faster and easier.