Open XML

http://porta25.com.br - Comunicação sobre iniciativas Microsoft e Open Source

http://microsoft.com/opensource - site da Microsoft sobre o tema Open Source

http://www.OpenXmlDeveloper.org/ - artigos, tutoriais, samples, Especificação da ECMA, Videos e um e-book gratuito

http://www.OpenXMLCommunity.org/ - Comunidade que apóia o OpenXML

http://www.codeplex.com/NDOS - 8 Demos e um projeto de conversor Texto -> OpenXML

https://www.microsoft.com/downloads/details.aspx?FamilyId=941B3470-3AE9-4AEE-8F43-C6BB74CD1466&displaylang=en - Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats

http://odf-converter.sourceforge.net/ - OpenXML/ODF Translator Add-ins for Office

http://www.microsoft.com/downloads/details.aspx?FamilyId=AD0B72FB-4A1D-4C52-BDB5-7DD7E816D046&displaylang=en - Microsoft SDK for Open XML Formats

http://www.codeplex.com/PHPExcel - PHP Excel 2007 classes

http://sourceforge.net/projects/openxml4j/ - OpenXML4J - Open XML library for Java

http://notes2self.net/archive/2007/03/05/OpenOffice-OpenXML-support-_2D00_-screenshots.aspx - OpenOffice e OpenXML

http://blogs.msdn.com/jasonmatusow/archive/2007/09/12/independent-implementations-of-open-xml.aspx - Adoção do OpenXML