Wikipedia
EPrints
EPrints is a free and open-source software package for building open access repositories that are compliant with the Open Archives Initiative Protocol for Metadata Harvesting. It shares many of the features commonly seen in document management systems, but is primarily used for institutional repositories and scientific journals. EPrints has been developed at the University of Southampton School of Electronics and Computer Science and released under a GPL license.
The EPrints software is not to be confused with " Eprints" (or "e-prints"), which are preprints (before peer review) and postprints (after peer review), of research journal articles (eprints = preprints + postprints).