Collaborate on PowerPoint presentations, spreadsheets, word documents, and more. Similar to Google Apps, but shows a condensed view of all recent project activity and includes group chat rooms, forums, wikis, and a tabbed interface.
Beautiful looking mind mapping site w/ the ability to embed into a site.
Use drop.io to privately share your files and collaborate in real time by web, email, phone, mobile, and more. Create each drop in two clicks and share what you want, how you want, with whom you want.