OneNote is pretty good for shared documentation. If you use a Notebook shared via SkyDrive and turn on "Sync automatically", it works really well. For example,

OneNote is pretty good for shared documentation. If you use a Notebook shared via SkyDrive and turn on "Sync automatically", it works really well. For example, if both of you edit the same page, but different parts of it, it manages to do a graceful merge of both of your work and not show a conflict. You have to fiddle with the exact same sentence for it to conflict, in my experience. I suggest 2+ Sections in your notebook : one dedicated to planning, TODOs, and the like, and one section for shared knowledge. Your "Useful links" would go here. The planning section we have has individual pages for : Business Paths, Quarterly Goals, Work To Be Done, and Daily Worklog (updated at EOD). That's it! From vision to actual work in one place. Let me know if you need more info. We invested time to design the Planning section, and it has really helped. This setup probably doesn't scale to beyond 3 people, but it works really well in keeping everyone on the same page for up to 3 people.