Dropbox, a file storage program I have been using for years, has added a document creation feature it calls Paper. It offers basic text editing tools which do a bit more than the editing tools in Evernote. Evernote has some basic imaging editing tools, but Paper does not. You have to use a third party editing tool to edit images with it. Both applications support rich media and let you share your files.
A Ph.D. student reports on her experience using Evernote to keep track of lab documents.