Also known as Xalan.  Xalan is an XSLT (Extensible Stylesheet Language Transformation) processor for transforming XML documents into HTML, text, or other XML document types.

Unit testing framework for XSLT transformations similar to the "*unit" environments available for other languages (i.e. Junit for Java).

XSLT test utility with user interface for various popular XSLT processors.

Tool that visualizes the processing of an XML file by an XSLT stylesheet.

XSLT benchmark and compliance testing suite (40 testcases). Support for various java and C/C++ processors.

XSLerator (XSL accelerator) is a tool to generate XSLT scripts from mappings defined using a visual interface. The tool supports mappings with extended conversion functions including iterations, conditions, joins, variables, and XPATH functions. Only minimal knowledge of XSLT is required.

Compiles XSLT stylesheets into C++ code for transforming XML files.

Compiles XSL files into Java classes for transforming XML files

xmlto is a front-end to an XSL toolchain. It chooses an appropriate stylesheet for the conversion you want and applies it using an external XSL-T processor.

Generates an XSLT stylesheet from a well-formed XML instance.

Creates an XSLT script from your well-formed XML instance, or your normalized DTD. Just copy the instance or DTD to your clipboard, and paste it into the appropriate window

Simple Apache module to serve XML based content using XSLT. Uses Sablotron to do the XSLT processing.

"The Internet Explorer tools for validating XML and viewing XSLT output will enable a shell option when viewing XML files to see the processed XSL output.

Extensive Listing of XML Style Tools

Visual XSLT is the powerhouse plug-in for creating robust and sophisticated XSLT transformations using Visual Studio .NET. Cutting-edge, synchronized debugging makes it easy to find errors in both input data and code. Generated HTML automatically appears in a browser window for quick validation. Visual XSLT also features a syntax-aware, Schema-aware editor with code completion, and seamless integration within Visual Studio offers familiar features including SCC-compliant source control support, a template browser, and project management.

Visual XSLT is the powerhouse plug-in for creating robust and sophisticated XSLT transformations using Visual Studio .NET. Cutting-edge, synchronized debugging makes it easy to find errors in both input data and code. Generated HTML automatically appears in a browser window for quick validation. Visual XSLT also features a syntax-aware, Schema-aware editor with code completion, and seamless integration within Visual Studio offers familiar features including SCC-compliant source control support, a template browser, and project management.

Visual XSLT is the powerhouse plug-in for creating robust and sophisticated XSLT transformations using Visual Studio .NET. Cutting-edge, synchronized debugging makes it easy to find errors in both input data and code. Generated HTML automatically appears in a browser window for quick validation. Visual XSLT also features a syntax-aware, Schema-aware editor with code completion, and seamless integration within Visual Studio offers familiar features including SCC-compliant source control support, a template browser, and project management.

Komodo is the high-productivity, integrated development environment (IDE) that supports development in XSLT, Perl, Python, PHP, Tcl, and numerous other languages on Windows and Linux. XSLT-specific features include our unique debugging technology and breakpoint control. Komodo also features advanced editing capabilities, an integrated debugger for Perl, Python, PHP, and Tcl, a tool to help you build and visually debug your regular expressions, and much more.