I came across this application when reviewing UVA’s SHANTI website. SHANTI promotes innovation at the University of Virginia through the use of advanced digital technologies in research, teaching, publishing and collaborative engagement. http://shanti.virginia.edu/
NowComment a sophisticated collaboration app available for group discussion and annotation of documents. It displays documents together with threaded commenting on their sentences and paragraphs to create engaging online conversations literally in context. Brainstorm, debate, and collaborate. Watch the two minute demo.
If you are interested in using this technology and would like a partner to help explore it, send an email message to itss-acad@colgate.edu and an instructional technologist will connect with you.