From OpenOffice.org Wiki

OpenDocument Tools at OpenOffice.org

Tools at OpenOffice.org
Tool	Summary
SAXEcho	SAXEcho is a tool to be used with the OpenOffice.org application. It allows to view the XML representation of a document at runtime. It can either display the native XML file format representation of an in-memory document, or the output of an an XSLT transformation on said document. It is written in Java.
xfilter tool	This page documents the xfilter tool, which lets you execute XML-based filters (as explained in the Filters using XML document) outside of OpenOffice.org or StarOffice.

External OpenDocument Tools

External Tools
Tool	Summary
ODFDOM	ODFDOM is an OpenDocument (ODF) framework. It's purpose is to provide an easy common way to create, access and manipulate ODF files, without requiring detailed knowledge of the ODF specification.
ODF Validator	ODF Validator is a Java tool that validates OpenDocument files and checks them for certain conformance criteria.
ODF Online Validator	ODF Online Validator is an online validation and conformance check tool for ODF documents.
ODF XSLT Runner	ODF XSLT Runner is a small Java command line application that allows you to apply XSLT stylesheets to XML streams included in ODF packages without extracting them from the package.
ODF XSLT Runner Task	ODF XSLT Runner Task is a task definition for Ant which allows to apply XSLT stylesheets to ODF documents similar to Ant's build-in <xslt> task.
The Perl OpenDocument Connector	This toolkit allows direct OpenDocument file update and creation from Perl scripts. It works with the main document classes (texts, spreadsheets, presentations, and drawings), and provides an easy access to a large set of content and presentation elements.
CMFOODocument	OpenOffice Documents for icoya Content & Collaboration Management - With CMFOODocument OpenOffice Writer files can easily be integrated inside your Plone site. The OO-Documents are converted by XSL transformation into HTML.
OpenOffice.org Perl Library	The OpenOffice.org Perl Library (ooolib) can be used to create simple OpenOffice.org Calc spreadsheet and Writer text documents.