Revizr

Revizr allows document sharing in a single host, similar to google docs or wikis, but not quite the same. It provides a way to review that does not overwrite previous writing. It annotates the original document. It is online and it is not free. It will provide free access for a limited time to users. One neat feature is that it allows the user to embed the document review in the blog or html pages. I am embedding a document below with annotations.