Anetto HTML Candy - Low cost validator is able to fix a wide range of problems with HTML syntax, including tags, styles, attributes, attributes' values, deprecated and obsolete elements and attributes. Each found item is listed with warning type and line number, and recommends a possible solution, Validate document objects: images, links, external scripts and css. 'Beautify' hard-to-read HTML code, generated by specialized HTML editors and conversion tools. XP-like interface, back-up system and HTML syntax highlighting; built-in editor. PHP, ASP, SSI, ColdFusion formats support.

RealValidator - Shareware HTML validator based on SGML parser by Liam Quinn. Unicode-enabled, supports documents in virtually any language; supports XHTML 1.0, HTML 4.01, HTML 4.0, HTML 3.2, HTML 3.0, and HTML 2.0 ; extensible - add proprietary HTML DTDs or change the existing ones; fetches external DTDs by HTTP and caches them for faster validation; HTML 3.2 and HTML 4.0 references included as HTML Help. For Windows.

CSE 3310 HTML Validator - HTML syntax checker for Windows from AI Internet Solutions. Supports wide variety of standards; accessibility (508) checking; uppercase/lowercase converter. Free 'lite' version. For Windows.