This site is running EPrints 3.3.12.
EPrints is free software developed at the School of Electronics and Computer Science at the University of Southampton, England.
Other institutions are invited (and encouraged) to set up their own open repositories for author self-archiving, using the freely-distributable EPrints software used at this site. The Southampton EPrints team can also provide hosting, training and consultancy services.
...and also thanks to the members of the eprints-tech mailing list and the EPrints Community members for advice and bug reports.