The Great War Archive (part of the the University of Oxford digitization project The First World War Poetry Digital Archive) includes historical materials related to First World War experiences that have been digitally captured and cataloged by members of the public.  Digital copies of publicly owned artifacts were submitted via the Web between March and June 2008.   The collection includes family photos, diaries, letters, artifacts, and oral histories.  The collection is still growing on The Great War Archive Flickr Group.

If you are interested in how to go about starting a community collection, Stuart D. Lee and Kate Lindsay’s article If You Build It, They Will Scan: Oxford University’s Exploration of Community Collections is a great place to start!

Another great digital collection based on the community collection principle is Flickr’s The Commons. This great picture of Stubby, the American army dog with the rank of sergeant contributed by Nationaal Archief is one of many great photos that can be found and used without copyright restriction.