Extension:Annotator

The Annotator extension allows inline commenting on articles

In-progress extension that will allow inline comments on MW pages (46440)

For more details, see:
 * Extension:Annotator/Prototyping inline comments
 * User:Rjain/Gsoc2013/Project Updates
 * http://annotator.wmflabs.org/wiki/Lorem_ipsum - a test installation on Wikimedia Labs