CSSED - If you have experience with TopStyle for windows and you are searching for a similar software for...
AngryTools Online Gradient Generator - Angrytools - Online CSS Gradient Generater interface to generate cross browser CSS gradient code as well as Android gradient code. generator produce linear or radial gradients that can be used in your web page design or android apps.
CSSEdit - Design beautiful, innovative and fast-loading web sites… with a beautiful, innovative and fast app.
Gradient Hunt - Curated collection of beautiful gradients, updated daily
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.
Adobe Capture - Turn any photo into a color theme, Look, vector graphic, or unique brush that you can use in your creative projects with Adobe Capture.