ActivityWeb

 ActivityWeb  was an overall “specification for a personal publishing and distributed social platform where you own all your data” proposed by Sandeep Shetty in 2012 that built upon PubSubHubbub, Activity Streams, ActivityPush, and ActivityDialog.

Github:
 * https://github.com/converspace/activityweb-specification

Sites (all of which are defunct)
 * activityweb.org
 * activitypush.org
 * activitydialog.org