The standard provides a general way to represent activities. For instance "Jack added Hawaii to his list places to visit". Would be represented as actor:jack, verb:add, object:Hawaii, target:placestovisit.
Implementors of the activity Activity Streams draft include Gnip, Stream, Stream-Framework and Pump.io.
The largest open source library (based on watchers) is Stream Framework, the authors of Stream-Framework also run getstream.io. In addition there is a trend of SOA (service-oriented architecture) where third parties power this type of functionality. [citation needed]
The concept of Activity Streams is also included in some Enterprise systems, such as Epicor Social Enterprise
^"Archived copy". Archived from the original on 2009-04-30. Retrieved 2009-04-28.{{cite web}}: CS1 maint: archived copy as title (link) Facebook opens activity streams; offers API to developers
New Facebook app lets users see real-time streams running on desktops or cell phones