There are 1 repository under activity-streams topic.
RDF vocabulary and hypermedia specification to publish your Linked Data using search trees
Kosmos Chat for the Web
Activity Streams is a simple specification used to describe social actions around the web.
A Ruby on Rails engine for building timelines.
Simple, generic, activity streams from the actions on your site.
UIMR Java Toolbox: Handy Java utility classes for quick research development.
Telegram Bot API Message ActivityStreams 2.0