grafix: SGML-based scientific diagram editor, can do arbitrary user-defined transformations of input data, data interpolation by several methods, and curve fitting to arbitrary user-defined functions; generates PostScript (EPS) output
A webbased XML development toolkit to edit, validate and preview XML files. This program gives you a structured view of the XML data.
It has support for multiple XML formats: SVG, DocBook, XHTML and more. phpXIedit is written in PHP.