- Scirus
"reports, peer-reviewed articles, patents, pre-prints & journals (scientific, scholarly, technical & medical)"
http://www.scirus.com/
- Scitopia.org
"content provided by its partner scholarly societies ... plus patents & government data"
http://www.scitopia.org/scitopia/
- Science.gov
"science and technology information from 17 organizations within 13 federal science agencies"
http://www.science.gov
- Science Research
Astronomy, Space, Biology, Nature, Chemistry, Computer, Technology, Earth, Environmental Sciences, +++
http://www.scienceresearch.com/scienceresearch/
- Scitation
"scholarly journals, magazines, conference proceedings, & special publications from scientific societies & technical publishers
http://scitation.aip.org/
- WorldWideScience.org
global science gateway connection to nat'l & internat'l scientific databases & portals"
http://worldwidescience.org
- Science Accelerator
"resources of the U.S. Department of Energy's (DOE's) scientific and technical information"
http://www.scienceaccelerator.gov/
- TechXtra
"engineering, mathematics and computing, including content from over 50 publishers and providers"
http://www.techxtra.ac.uk/
- sciseek
Directory of sites
http://www.sciseek.com/
- CiteSeer
"literature in computer and information science"
http://citeseer.ist.psu.edu/
- IBM Technical Paper Search
"technical reports written by members of the IBM Research community."
http://domino.research.ibm.com/library/cyberdig.nsf/index.html