A server side XSLT processor written in Perl [Open source, GPL].

A package collecting the tools required for writing basic XML applications in Python, along with documentation and sample code. Features include (but are not limited to) SAX, DOM, the xmlproc validating parser, and an Expat interface.

SAXON is an XSLT processor developed by Michael Kay.

A text based tool to debug stylesheets and it is similar to the Unix/Linux debugger gdb. It uses using the libxslt library.

Parses XSL Transformational sheets. It uses XML::Parser and XML::DOM. Project information, man page, and downloads.

PSGML is a GNU Emacs Major Mode for editing SGML and XML coded documents. PSGML has several functions for editing SGML documents. Indentation according to element nesting depth and identification of structural errors (but it is not a validating SGML p...

A powerful editor with XSLT processing and debugging capabilities. You can run an XSLT processor on the Emacs buffer you edit, and view the results either in another Emacs buffer or in a browser.

Generates valid FO documents from almost any (even badly formated) HTML file. Freeware.

Open source CSV to XML converter.

A free Java based XML editor that can perform validation, XSL transformations, schema/DTD generation, code completion, and formatting. Details of features, project information, screen-shots, and download. [GPL]