Notre-DAM is an open-source Digital Asset Management platform targeted to the mid-market segment (digital libraries, micro-stock agencies, editorial teams, etc.).
The key features of Notre-DAM are:
multi-user, web-based application accessible from the most popular browsers
can manage images, video, audio and text
provides a customizable catalogue based on taxonomies and collections
full metadata support (EXIF, IPTC, XMP, Creative Commons, PLUS)
geo referencing and search, directly on a map
fully scalable, relies on a cluster of PCs for resource storage, processing, and delivery
provides a REST API for integration with other applications (e.g. CMSs)
distributed under the GPL v.3 license
More information (and an on-line demo) is available on the project's web site Notre-DAM.org. A short video presentation is available too.