IBM WebSphere DataPower SOA Appliances
- DGXT is an optimized software-based XSLT interpreter that is cross-platform and fully compliant with the current XSL specification. The XA35 XML Accelerator is a hardware-based solution that speeds XSLT, XPath, XSD (Schema validation) by 30X or more [Comm
- http://www-306.ibm.com/software/integration/datapower/

XML/XSL Portal
- Utilities and downloads for XSLT and related developers.
- http://www.bayes.co.uk/xml/

Microsoft XML Downloads
- Contains an XSLT engine, which fully implements the XSLT standard [Freeware].
- http://msdn.microsoft.com/XML/XMLDownloads/

4Suite XML Tools
- Includes an XSLT Processor written in Python by FourThought LLC [Open Source].
- http://4suite.org/

Sablotron
- Sablotron is an attempt to develop fast, compact and portable XSLT processor. Supported platforms: Linux, Windows NT and Solaris [Open Source, GPL].
- http://www.gingerall.org/sablotron.html

Tiger XSLT Mapper
- Drag and drop XSLT Editor that doesn't require knowledge of XSLT syntax. Developer edition is free [Commercial].
- http://www.axizon.com

XSLScript
- Terse notation for writing complex XSLT stylesheets
- http://pault.com/XSLScript/

XSL Processor for ColdFusion
- CFX Tag allows you to perform XSL Transformations with ColdFusion. Free developer edition, commercial sites must purchase a license per server.
- http://www.activsoftware.com/xml/xslt/

XSL Template Designer
- Includes a Windows GUI that simplifies designing layouts for complex XML forms and a runtime Engine that merges a layout with XML data to produce a PDF via XSL-FO [Commercial].
- http://www.antennahouse.com/product/designer/

Xsltp.pl
- Perl CGI XSLT processor [Open Source].
- http://www.dopscripts.com/doc/description.html

Ecrion XF Rendering Server
- Uses XSL formatting objects to dynamically create customized PDF, POSTSCRIPT, HTML, GIF, JPEG, or PNG files from XML data [Commercial].
- http://www.ecrion.com

xsl:easy
- Transformation tool using built-in graphical XSLT editor to create XML out of arbitrary data and save the transformation result back to other formats [Commercial].
- http://xsl-easy.com

XSL Transformations (XSLT) in Mozilla
- Information about Mozilla's native XSLT processor. Includes a FAQ and a list of known bugs.
- http://www.mozilla.org/projects/xslt/

Scriptura
- A letter, report, and output generator for XSLT/XSLFO documents. GUI Designer for stylesheets, plus an Engine to create XSLT, XSLFO, PDF, XHTML, and PCL5. [Commercial].
- http://www.inventivedesigners.com/products/scriptura.html

ShoXS: a Shorter XSL Syntax
- ShoXS is a Shorter Syntax for XSL and this site provides some tools to read XSL files, convert and edit in ShoXS then convert back and save in XSL [Open Source, GPL].
- http://www.xm.co.nz/ShoXS.htm

The SAXON XSLT Processor
- Java XSLT processor developed by Michael Kay [Open source, MPL].
- http://saxon.sourceforge.net/

PassiveTeX
- A library of TeX macros which can be used to process an XML document which results from an XSL transformation to FO (formatting objects) [LaTex].
- http://www.tei-c.org/Software/passivetex/index.html

Xalan-C++
- XSLT Processor written in C++. A part of Apache's XML project [Open Source].
- http://xml.apache.org/xalan-c/index.html

XSet
- An XML property set description of XML 1.0 and XML namespaces that enables XPath based indexing and addressing of the full fidelity grove of an XML document.
- http://www.openhealth.org/XSet/

libxslt
- XSLT C library developed for the Gnome project [Open Source, MIT].
- http://xmlsoft.org/XSLT/

Unicorn XSLT Processor
- XSLT processor for Windows written in C++ [Freeware].
- http://www.unicorn-enterprises.com/products_uxt.html

XML::XSL
- A server side XSLT processor written in Perl [Open source, GPL].
- http://xmlxslt.sourceforge.net/

MDC-XSL
- XSLT processor written in C++ [Open source, GPL].
- http://mdc-xsl.sourceforge.net/