CUNY Academic Commons

On TAPoR: http://tapor.ca/tools/88

Commentpress is an open source theme and plugin for WordPress 3.3.1 or later designed to enable readers to contribute comments to each paragraph of a text and display those comments in the margins. Commentpress turns a text into a conversation, whether a blog or a fixed document such as an essay, book or article. It may also be used to add a gloss or annotations to a document. This tool is also available for BuddyPress and BP Group Blog.