The Butterfly XML Editor and IDE is an XML editing environment built on top of a real-time incremental XML parsing algorithm. It features syntax and error highlighting, incremental validation, intelligent code completion (based on XML Schema, DTD, or document analysis), XSLT Debugging, XSLT pipelines, Docbook Rendering, XSL:FO Rendering, and side-by-side DOM and source viewing. Built-in support for Docbook, XSL:FO, XHTML, XSL, Xforms, XML Schemas, XSP, and Cocoon sitemaps is included. Support for other XML types can also easily be added. It is capable of parsing documents that are not well-formed, and shows the source of the errors, allowing for the easy conversion of HTML to well-formed XML. XSLT pipelines simplify the process of building up and visualizing complex transformations.
EditiX is a cross-platform and multi-purpose XML editor and XSLT debugger (1.0 and 2.0), which helps Web authors and programmers use XML and XML-related technologies, such as XSLT, FO, and XSD schemas. It provides a lot of functionality within a refined IDE, which guides the user with intelligent entry helpers, and has real-time XPath location and syntax error detection. It allows the user to apply an XSLT or FO transformation, and shows the result in a separate view. It includes default templates for XML, DTD, XHTML, XSLT, XSD, XML RelaxNG, SVG, MathML, and XML FO. It can generate schema W3C, DTD or RelaxNG from a document instance.
Free Java is a development environment designed to help beginners write Java programs. Its editor includes syntax highlighting and an undo/redo function. It features a structure panel and a file browser. Compiling and running a program can be done with the push of a single button, and compiler errors are shown clearly. There is also a virtual console to show a program's console output. Free Java is based on J2SDK 1.3.