It's a conversion library from XHTML to ODT, based on XSL stylesheets for portability.It is designed to help web applications export their content to ODT and ships with scripts for Python, PHP and Bash.

LyX is an open source document processor running on Windows, Linux and MacOS X. Unlike standard word processors, LyX encourages an approach to writing based on the structure of documents, instead of their appearance. Export to ODF is done by using configurable converters.

odt2braille is a Braille extension to OpenOffice.org Writer. odt2braille will enable authors to print documents to a Braille embosser and to export documents as Braille files. The Braille output is well-formatted and highly customizable.

A python templating library which provides a way to easily create all kinds of document formats, including ODF.

PHPOpenDocument is an oriented object libary for PHP 5+. It allows you to generate automatically ODF text documents from templates. You can use it directly within your PHP scripts (without having to install a wordprocessor).