WestCiv has released Style Master 2.2, the latest version of their cascading style sheet development environment for the Mac.
Style Master enables both WYSIWYG (what you see is what you get) and hand-coded development of valid style sheets, according to Maxine Sherrin of WestCiv. Version 2.2 includes: style sheet templates; automated creation of style sheets from legacy, appearance based HTML; improved find and replace, color-coded text, white space control; and other hand-coding helpers
Style Master 2.2 runs on Mac OS 8 and up. However, a Mac OS X version is under development, according to MacTech magazine . The product costs US$29. More info and a demo version can be found at the product Web site.