yohman

This plugin allows you to upload Word, Powerpoint and Excel files (doc, docx, ppt, pptx, xls and xlsx) through the media library uploader.

Allow Word/Powerpoint/Excel file uploads

This plugin allows you to upload Word, Powerpoint and Excel files through the media library uploader.

Ben Lobaugh (blobaugh)

Channel 9 is a video service run by Microsoft. Channel 9 provides a way to embed videos 
but is not yet on the WordPress embeds core list. This plugin allows you to simply paste 
a URL to a Channel 9 video as you would with any other embed service into your post. 
The video from Channel 9 will show at that location.
Channel 9 can be found at http://channel9.msdn.com

Channel 9 Embed

Channel 9 is a video service run by Microsoft. Channel 9 provides a way to embed videos

Allow Word/Powerpoint/Excel file uploads vs Channel 9 Embed