Allora leverages leading edge XML mapping and database technology to give application developers  bi-directional access to relational databases without the need for complex SQL or XSLT programming.  Allora speeds development and deployment by accurately and transparently transforming data  structures between XML elements and relational database structures. Once Allora mapping  is in place, full bi-directional XML-RDB access is enabled. Allora gives developers a simplified,  consistent XML interface to relational data. Allora brings even more value to application developers or DBAs that need to integrate any relational  database (Oracle, DB2, SQL Server, MySQL, Sybase, MS Access, Gupta, Ingres, Datacom, IDMS,  PostgreSQL, VisualFox Pro, Pointbase, etc…) with complex industry standard schemas.

XML-based applications often require the use of an XSLT engine for performing transformations, an XQuery engine for executing queries, and/or an XML parser for well-formedness checking and validation. Altova makes the same engines that drive its award-winning XMLSpy, MapForce, and StyleVision XML development tools available for use in your custom applications. That means you can use the very engines that have helped make Altova software the industry’s leading XML development toolset in your own applications – free of charge!

Castor is an Open Source data binding framework for Java[tm]. It's the shortest path between Java objects, XML documents and relational tables. Castor provides Java-to-XML binding, Java-to-SQL persistence, Castor XML is an XML data binding framework. Unlike the two main XML APIs, DOM (Document Object Model) and SAX (Simple API for XML) which deal with the structure of an XML document, Castor enables one to deal with the data defined in an XML document through an object model which represents that data. Castor XML can marshal almost any "bean-like" Java Object to and from XML. In most cases the marshalling framework uses a set of ClassDescriptors and FieldDescriptors to describe how an Object should be marshalled and unmarshalled from XML.

Seamlessly connecting mission-critical systems and users to a variety of disparate data sources, the DataDirect Data Integration Suite delivers scalable, reliable access to enterprise data. The Data Integration Suite is a comprehensive, yet affordable software solution that reduces data integration Total Cost of Ownership and enhances the overall bottom line.

dom4j is an easy to use, open source library for working with XML, XPath and XSLT on the Java platform using the Java Collections Framework and with full support for DOM, SAX and JAXP.

JiBX is a tool for binding XML data to Java objects. It's extremely flexible, allowing you to start from existing Java code and generate an XML schema, start from an XML schema and generate Java code, or bridge your existing code to a schema that represents the same data. It also provides very high performance, outperforming all other Java data binding tools across a wide variety of tests.

JXMLPad is a pure Swing java component/framework for editing XML/XHTML document.

The Open Source SAXON XSLT processor developed by Michael Kay of Saxonica Limited. It also provides information about commercial versions of the Saxon product available from Saxonica.

The Saxon package is a collection of tools for processing XML documents. Saxon continues its tradition of implementing new W3C drafts as soon as they become available.

XimpleWare's VTD-XML is, far and away, the industry's most advanced and powerful XML processing model  for SOA and Cloud Computing!

Xalan-Java is an XSLT processor for transforming XML documents into HTML, text, or other XML document types. It implements XSL Transformations (XSLT) Version 1.0 and XML Path Language (XPath) Version 1.0 and can be used from the command line, in an applet or a servlet, or as a module in other program. Xalan-Java implements the javax.xml.transform interface in Java API for XML Processing (JAXP) 1.3. This interface provides a modular framework and a standard API for performing XML transformations, and utilizes system properties to determine which Transformer and which XML parser to use. Xalan-Java also implements the javax.xml.xpath interface in JAXP 1.3, which provides an object-model neutral API for evaluation of XPath expressions and access to the evaluation environment.

Welcome to the future! Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family. This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building parser components and configurations that is extremely modular and easy to program.

What is XMLBeans?

XMLBeans is a tool that allows you to access the full power of XML in a Java friendly way. The idea is that you can take advantage of the richness and features of XML and XML Schema and have these features mapped as naturally as possible to the equivalent Java language and typing constructs. XMLBeans uses XML Schema to compile Java interfaces and classes that you can then use to access and modify XML instance data.

XOM™ is a new XML object model. It is an open source (LGPL), tree-based API for processing XML with Java that strives for correctness, simplicity, and performance.