CodePlex, Microsoft's community development Web site. You can use CodePlex to create new projects to share with your fellow developers around the world, join others who have already started their own projects, or use the applications on this site and provide feedback.
Port25 - Communications from the Open Source Lab @ Microsoft
ODF Add-in for Word 2007 - Open XML Translator provides tools to build a technical bridge between the Open XML Formats and Open Document Format(ODF). As the first component of this initiative, the ODF Add-in for Microsoft Word 2007 allows to Open & Save ODF documents in Word.