Evernote is a free service that allows you to take and store notes in different formats – text, image (picture/scanned), or audio.
Reviews on various tools I have come across
Google Voice is a tool I have been attempting to get people to convert to. [I think this may be a U.S. only tool].
For an overview video presentation as to what the service is, I would suggest starting here, where there are more video presentations as to what the service does and other tricks.