BETA TAG MY DOC is hoping to make the dreaded "Track Changes" feature a bit more social. Through an innovative use of QR codes, TagMyDoc allows content creators to share an unlimited number of virtual document copies for comments and feedback. Readers have access to the latest version of the document and creators have can share and receive feedback without the hassle of email. Creators can also sync with Google Drive, Dropbox, and Box to keep the entire process contained in the cloud. It's too early to tell if TagMyDoc will take off -- Gmail addresses are much more ubiquitous than QR codes -- but there does seem to be an application for living documents like syllabi and group writing projects. Sign up here for free.
