TopStyle offers many unique features, including the option to upgrade your HTML documents by replacing outdated markup with equivalent styling. You can also convert HTML to XHTML and check your CSS syntax against multiple browsers, using a side-by-side preview. A harmonious colors feature allows you to easily create pleasant color schemes for your site and more. 

Key Features:

• Preview CSS while you write it.
• Easily create pleasant color schemes for your site.
• Style Checker validates your CSS syntax against multiple browsers.
• Use Site Reports to see at-a-glance where CSS styles are used in your site.
• Style Upgrade quickly replaces all outdated HTML code with equivalent CSS styling.