Stylizer - A productivity-focused real-time CSS editor for serious web developers. Mac OS X and Windows.
CSSED - If you have experience with TopStyle for windows and you are searching for a similar software for...
EnjoyCSS - CSS generator for rich graphical styles without coding
CSSEdit - Design beautiful, innovative and fast-loading web sites… with a beautiful, innovative and fast app.
BlueGriffon - An HTML editor based on Mozilla rendering engine.
Topstyle - TopStyle contains powerful tools for building standards-compliant web sites.