Open Context, a free, open-access online database resource for archaeology and related fields, is a highly-generalized tool that pools and integrates individual researcher datasets and museum collections. To help make sense of this widely varying body of material, we have developed a user folksonomy system. Individual users can add value to the pooled content by identifying and annotating items of interest using a tagging system. Open Context has a variety of demonstration datasets now available for exploration and testing. These include field archaeology contextual records and finds registers, geo-archaeological samples, and a variety of zooarchaeological analyses. Some projects have rich image collections and narrative material, and others are of primary interest for specialist comparative analyses.