The test team has been very busy this year working on OneNote 2010 (you can get the beta here: http://www.microsoft.com/office/2010/en/default.aspx). While we have not had a tremendous amount of free time to create powertoys, I can still dig up the ones that we gave out this year.

1. Adapx Page Expander: http://blogs.msdn.com/johnguin/archive/2009/03/09/a-powertoy-to-make-using-adapx-pens-for-onenote-a-little-easier-for-me.aspx. This merely expands a page from a given size to infinite in each direction.
2. The AutoHotKey script: http://blogs.msdn.com/johnguin/archive/2009/04/02/a-really-great-tip-to-make-getting-information-into-onenote-much-easier.aspx. Not really from the OneNote team - Jordan Knight gets credit for this one. A little setup work is required, but the payoff is very nice.
3. Highlighted Text finder: http://blogs.msdn.com/johnguin/archive/2009/08/24/a-beta-powertoy-for-onenote-2007-to-extract-highlighted-text-from-a-page.aspx. In Beta since it only works for English text, but finds and extracts highlighted text from a page.

Like I said, not a tremendous output. But OneNote itself is so great, what else do we need to add :) ?

If you want to write your own addins, a great starting point is the OneNote Developer Center at http://msdn.microsoft.com/en-us/office/aa905452.aspx. The schema reference is a must read as well - it would have saved me a few hours had a I read through it before starting on some of my addins.

Questions, comments, concerns and criticisms always welcome,

John