Oxygen is a full-featured XML editing and development environment. It is suitable for both text encoders and XML developers. For developers, it includes an Eclipse plug-in. IU has a site license for this product, a Java application available for Mac OS, Unix/Linux, and Windows. After installing the application you will be asked to paste the license text into a dialog box. See below for downloads links and the license.
Oxygen Site License Key
These stylesheets, developed for The Swinburne Archive, convert TEI documents to XHTML. There are a number of parameters that may be set to modify the output. There is some documentation in the bundle and embedded in the tei2html-conf.xsl file.