·Brian Jones & Zeyad Rajabi: Office Solutions: http://blogs.msdn.com/brian_jones/ -- focus on the types of Business Applications people are building that leverages Office functionality. There are miscellaneous articles about SDK, especially the sample code of real-world scenarios.
oBrian Jones: a program manager in Office. He has been working on the XML functionality and file formats in Office, as well as other technologies folks use for extending Office in various ways.
oZeyad Rajabi: an Open XML document format Program Manager within the Microsoft Office division.
·Oxygen XML Editor: Extract, validate, edit and process the XML data stored in Office 2007 files and any other ZIP-based archive. These capabilities allow developers to use data from Office 2007 documents together with validation and transformations (using XSLT or XQuery) to other file formats.
·VSTO Power Tools: Explorer the internal structure of Open Xml File Format package & simplify Office development by using included re-usable class libraries.
·PHPExcel: Provide a set of classes for the PHP programming language, which allow you to write to and read from different file formats, like Excel 2007, PDF, HTML...
·Simple OOXML: A set of helper classes to make the creation of Open Office XML documents easier. Uses the Open Office SDK v 2.0. Modify or create any .docx or .xlsx document without Microsoft Word or Microsoft Excel. It provides high-level functions built upon SDK.
·FlexDoc: A template-based server-side Word document generator.