OASIS OpenDocument Technical Committee:Project for the development of an open, XML-based document format. Activities, workgroups, documents.
bonAveo: OpenDocument: A quick reference for the open source OASIS OpenDocument standard. Human-readable description, support and continued development of the format.
ISO and IEC Approve OpenDocument OASIS Standard for Data Interoperability of Office Applications: Press release from ISO concerning the approval of ODF v1.0 as the standard ISO/IEC 26300.
OASIS News: Members Approve OpenDocument as OASIS Standard: Official press release covering the approval of ODF v1.0.
OASIS OpenDocument Essentials: Online book with useful information for developers about how to work with the format. Available in HTML and PDF formats, with option to purchase a hard-copy.
ODF Add-in for Word 2007: Microsoft-sponsored Source-Forge project to develop a plug-in which will allow the import and export of OpenDocument files. Documentation, downloads, and information for contributers.
ODFReader: Extension for the Firefox web browser, which adds the capability to view OpenDocument text files.
Open Document Fellowship: Grass roots group promoting the file format. Details of activities, online resources, and membership information.
OpenDocument Format Alliance: Alliance of companies and organizations seeking to promote and advance the use of ODF and educate policymakers on its benefits. List of members, resources, and press releases.
What Is OpenDocument?: Sam Hiser looks at ODF, how it implements XML for office documents, the technical and political wranglings in the standard, and the currently available tools and applications.
Wikipedia: OpenDocument: Encyclopedia article explaining the format, its features and implications.