3BOpenDoc ensures that interoperability is not a barrier to organizations when looking at adopting ODF. 3BOpenDoc allows users to seamlessly exchange OpenDocument Format (ODF) files with users of other document formats, by converting ODF files ‘on the fly’ as they are emailed or viewed/checked-out of a document or content management system. 3BOpenDoc can convert ODF to and from many file formats including Microsoft Office.

EuroOffice is the name of a free and open-source OpenOffice.org derivative and a set of accompanying free and non-free extensions. Most of the extensions also work with "vanilla" OpenOffice.org.

The EuroOffice application suite provides us a means to enable some of our extensions to do more than what is possible in OpenOffice.org. Since it is open-source we hope that these additions will be considered improvements by our users and adopted in the future by OpenOffice.org developers. We have signed the JCA, so nothing stands in the way of adoption.

Google Docs & Spreadsheets accepts most popular file formats, including DOC, XLS, ODF, ODS, RTF, CSV, etc.

IBM® Lotus® Symphony™ is a richly-featured set of productivity tools that are intuitive and easy to use and provided at no charge. Lotus Symphony puts you in charge – take control over spiraling upgrade costs, ensure access to documents well into the future with new standard file formats (ODF), get more from your current investments with support for Microsoft® Windows® and Office file types.... even extend your applications with the new Lotus Symphony developer toolkit.

IBM® Lotus® Symphony™
is designed to leverage open technology and provide an easy development
and deployment environment. With support for Eclipse plug-in,
LotusScript® and Universal Network Objects
(UNO) component model, Lotus Symphony can be extended to integrate with
and enhance a wide range of applications from IBM and you. Leverage
Lotus Symphony in your business solution.

aDesigner is a disability simulator that helps designers ensure that their content and applications are accessible and usable by the visually impaired. The new version adds support for ODF and Flash content; presentation simulation function for ODF documents; and accessibility information (MSAA/IA2) inspection functions.

A pure Java library for OASIS Open Document files manipulation

jOpenDocument is a free library for developers looking to use Open Document files without OpenOffice.org.

You can use jOpenDocument to:

KOffice is a free, integrated office suite for KDE, the K Desktop Environment.

KOffice 1.5.2 is the current official KOffice release. Please see the release notes for further details.

Mobile Office is an Office suite for Symbian smartphones.

You can now read (and later on edit and create) your files also on your mobile and have them always with you on the road without the need to convert them to other formats as well as compromising on formating and ODF features.

Nuxeo 5 is the leading open source ECM platform. It enables companies and organizations to manage all their documents thoughout their full lifecycle, ensuring collaboration among people, business process efficiency and accountability.

Nuxeo 5 natively supports the OpenDocument Format. Data and metadata are extracted from the documents to provide high-level services, including: full-text indexing and searching, classification, data consolidation, etc.