The basic plan is free and includes a domain for 1 site, 15 standard plugins, 5 themes, and 500MB of storage. Other plans range in fees from $49/year for an individual to $999/year for institutions, which includes an unlimited number of themes, sites, and plugins... There are 15 plugins available for all plans and include features like the exhibit builder, Google Analytics, Library of Congress Subject Headings, and social bookmarking, but even some pretty basic plugins, like extended Dublin Core, commenting, HTML5 media, and CSS editor, require a fee-based plan. A greater number of plugin and theme options are available for higher level plans... Considered an industry leader in collection management systems, CONTENTdm is proprietary software for building, cataloging, and managing interactive digital collections (Kroski, 2013). It was acquired in 2006 by Online Computer Library Center (OCLC), and it uses the Dublin Core Metadata Element Set, which developed out of an OCLC workshop..