Apache XML Project
- The goals of this project are: commercial-quality standards-based XML solutions that are developed in an open and cooperative fashion, to provide feedback to standards bodies from an implementation perspective, and to be a focus for XML-related activities within Apache projects; information and links to XML projects under the aegis of the Apache Project can also be found here.
Chiba Home
- An open source implementation of the W3C XForms standard.
Dave's Page -- Open Source Projects
- Tools for building data mapping and Web services. These projects focus on XML and are written in or for Python.
IBM developerWorks : XML Zone
- Includes tools and products, code and components, education articles, columns and tips, news, forums, and related links.
Libxml
- An XML C parser and toolkit developed for the Gnome project (but usable on other platforms).
Serna Free - Open Source XML Editor
- A cross-platform XML editor that combines the unique WYSIWYG approach with intuitive behaviour to help writers with virtually no XML experience to easily write and edit XML documents.
The Castor Project
- Mapping framework between Java objects, XML documents, SQL & OQL databases and LDAP directories.
The SAXON XSLT Processor
- A cross-platform, open source XSLT and XQuery processor. Latest stable release is 9.1.0.1, 2008-07-02.
The XML FAQ
- The latest version of this useful document is 4.56, 2007-08-08.
XForms Home Page
- XForms are comprised of separate sections that describe what the form does, and how the form looks; this allows for flexible presentation options, including classic XHTML forms, to be attached to an XML form definition.
XML Copy Editor
- A fast, free (GPLed), validating XML editor.
XML Database Products
- An extensive directory of XML database products currently available.
XML Tutorial
- One of the best XML tutorials available for both the beginner and the advanced user.
XML-RPC Home Page
- A specification and a set of implementations that allow software running on disparate operating systems and in different environments to make procedure calls over the Internet.