Scholarly Communication  Tags: research scholarly_communication publishing open_access copyright  

The most commonly used platforms in the United States are:

Digital Commons
http://www.bepress.com/ir/
Hosted platform.  3 components: institutional repository (called a Research Showcase), individual faculty web pages (called Selected Works), and a journal publishing tool.
Features of Digital Commons: http://www.bepress.com/ir/features.html
Instituitons using Digital Commons: http://digitalcommons.bepress.com/institutions.html

DSpace
http://www.dspace.org/
Open-source platform that is customizable.  Large community of users.
More on DSpace: http://www.dspace.org/index.php/Introducing-DSpace/
Institutions using DSpace: http://www.dspace.org/index.php/DSpace-Instances/Repository-List.html

* In May 2009, DSpace announced it is merging with Fedora.  The new organization is called: DuraSpace.

Other platforms:

EPrints
http://www.eprints.org/

Fedora Commons
http://www.fedora-commons.org/