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CSE HTML Validator Lite is a free and user-friendly software for Windows that enables the creation of error-free HTML, CSS, and XHTML documents. This software is a great tool for learning and development purposes while keeping your website running smoothly.

The Stylus Studio XML IDE offers a range of tools for editing, debugging, testing, and deploying XML technology including XML Schema, DTD, XSL/XSLT, XPath, XQuery, XML Mapping, and SQL/XML. Additionally, it provides support for EDI and other XML technologies.

mirabyte Web Architect is a web development software that allows the creation of modern and professional websites and web applications. The software supports all relevant web standards and technologies such as HTML, HTML5, XHTML, CSS, CSS3, JavaScript, and PHP among others.

BBComposer is a software that offers a WYSIWYG editing feature for textareas. It supports four languages, including XHTML, BBCode, XBBCode, and Wiki. This software is particularly useful for CMS and Forums and produces valid XHTML 1.0 Strict source.

This tool allows users to easily customize templates with a WYSIWYG environment. No coding skills required- simply click and adjust the look and feel of the template in real-time.

Weaverslave is a customizable editor with tag and text snippet insertion through a menu or tool window. Provides support for HTML tags and PHP functions.