Open Archives, Citations

This is an interest of mine.

http://www.openarchives.org/: The Open Archives Initiative develops and promotes interoperability standards that aim to facilitate the efficient dissemination of content.
http://citebase.eprints.org/help/: Citebase allows researchers to search across free, full-text research literature eprint archives, with results ranked according to many criteria (e.g. by citation impact), and then to navigate that literature using citation links and analysis.
http://citeseer.nj.nec.com/: CiteSeer is a scientific literature digital library that aims to improve the dissemination and feedback of scientific literature, and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness.
http://www.informatik.uni-trier.de/~ley/db/index.html: DBLP Bibliography.
http://www.library.iitb.ac.in: IITB library resources
http://www.utexas.edu/world/lecture/World Lecture Hall
http://libdata.unm.edu/ftf/Full Text Search