OpenDOAR quality-assured, global Directory of Open Access Repositories
Registry of Open Access Repositories ROAR is hosted at the University of Southampton, UK and is made possible by funding from the JISC. ROAR is part of the EPrints.org network.
Scirus (an Elsevier product) provides access to scientists’ homepages, institutional repositories and pre-print serves in additional to journal articles.
Registry of Research Data Repositories
in keeping with the spirit of "Open Access," here are two resources that will help you keep up-to-date on Insitutional Repositories
D-Lib Magazine a free publication with a focus on digital library research and development, including new technologies, applications, and contextual social and economic issues. D-Lib Magazine appeals to a broad technical and professional audience.
E-Prints in Library and Information Science E-E-LIS is the largest international document repository for full text scientific papers in Library and Information Science. E-LIS is organised, managed and maintained by an international team of librarians.