ScienceDirectory.info is a leading science website including agriculture, metrology, industrial engineering, earth sciences, geography, mathematic, aquaculture, aerospace and more.
InterJournal
Distributed self-organizing refereed electronic journals on selected topics in science and engineering. Current topics: complex systems, genetics, polymers and complex fluids.
http://www.interjournal.org/
Project Muse
digitizes and makes available by electronic subscription all journals of the Johns Hopkins University Press.
http://muse.jhu.edu/