Looking for a powerful tool for creating standards-compliant sites? Consider TopStyle, written by the creator of HomeSite, the world famous HTML-editor.

You can edit your HTML, XHTML and CSS in a single program.
Preview CSS while you write it.
Style Checker to validate style sheets against multiple browsers. 
Style Upgrade tool to quickly replace all outdated HTML code. 
Site Reports to see at-a-glance where styles are used in your site.

TopStyle offers many unique features, including the option to upgrade your HTML documents by replacing outdated markup with equivalent styling.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.

TopStyle Pro offers complete site management with the built-in File Explorer, clip libraries and resource manager and integrates with existing web authoring tools.

Here are some key features of "TopStyle Pro":

· HTML, xHTML and CSS Editing in a Single Program: HTML attributes are categorized so you can quickly see which are required, and it generates XHTML-compliant markup with a simple toggle.
· Easy Navigation Between Documents: Click an HTML class attribute to navigate to the definition of that class in an external style sheet or click an anchor tag or CSS link to open the linked file for editing. You can even click on an < img > tag to open the image file in your favorite image editor.
· Element and Attribute Validation as You Type: All of the classes are defined in your style blocks and external style sheets, so assigning a class to an HTML tag is a very simple task.
· Style Checker: Validate your style sheets against multiple browsers, flagging any invalid properties or values it finds. You can also pass your style sheets directly to the W3C's CSS Validation Service, so you can quickly check against the official CSS specifications.
· Style Upgrade: A quick, reliable way to replace all deprecated (outdated) HTML markup - including the long-abused HTML < font > tag - with equivalent CSS.
· HTML Tidy Integration: Make the move to XHTML painless with the built-in Tidy configuration, which converts HTML to XHTML with a single click!
· Site Reports: See at a glance where styles are used in your site. Find out where you've applied style classes that aren't defined in any style sheets, or see what style classes you've defined that aren't being used.
· Full Screen Preview: Split the preview between Internet Explorer and Mozilla for an immediate look at browser differences. You can even change the !DOCTYPE of each preview panel on-the-fly to see how different document type declarations affect your layout.
· Integration with W3C HTML Validation: Results of the validation are displayed within TopStyle, with hyperlinked line numbers that synchronize with TopStyle's editor.

Requirements:

· Pentium 300 MHz or higher processor
· 64MB RAM or OS minimum (whichever is greater)

Limitations:

· only 2 style definitions
· a comment is added on every CSS file
· limited features

What's New in This Release: [ read full changelog ]

· TopStyle 4 includes many new features to help you create and maintain CSS and (X)HTML documents that support best practices and the latest technologies.
· Unicode
· When you save your (X)HTML document (File > Save As), you can optionally select encoding for your document. TopStyle allows you to save your document ANSI-encoded (the TopStyle 3.x default), or Unicode-encoded (UTF-8 or UTF-16).
· When you open an existing document (File > Open), TopStyle will try and auto-detect the encoding for the document you're trying to open. If the document you're trying to open does not contain a BOM (byte-order mark), auto-detect assumes your document is ANSI-encoded (the TopStyle 3.x default).
· Note: TopStyle will always include a BOM (byte-order mark) with your Unicode-encoded documents.
· Live FTP editing
· TopStyle allows you to edit online documents via FTP (File Transfer Protocol). The new FTP Explorer Panel (View > Panels > FTP Explorer Panel) allows you to drag-and-drop documents from your FTP...