Evernote isn't too bad - all the data is cached locally in xml files with attachments - one directory per document. It is almost xhtml - the top level content w

Evernote isn't too bad - all the data is cached locally in xml files with attachments - one directory per document. It is almost xhtml - the top level content wrapped in an en-note tag and the images are en-media tags. I agree that it's important to be sure you can get your data back out of whatever you're using. And another benefit of something like org mode that uses text files as a backing store is that you can edit/consume them with whatever tools you want.