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.
Topstyle - TopStyle contains powerful tools for building standards-compliant web sites.
Color Palette Generator - Enter the URL of an image and find its color palette
Stylizer - A productivity-focused real-time CSS editor for serious web developers. Mac OS X and Windows.
Klart.io Colors - A data-driven collection of beautiful color palettes 🌈
EnjoyCSS - CSS generator for rich graphical styles without coding