Scirus Search engine that fetches only scientific websites. http://www.scirus.com/

Phibot An intelligent internet information retrieval tool for scientists. http://www.phibot.org

Online Journals Search Engine A multi-search tool that permits queries of a number of scientific journals. http://ojose.lanners.org/

SciSeek Science search engine and directory. Also provides forums, tools and related news. http://www.sciseek.com

Meta Search Engine for Scientific Literature A multi-search tool that permits queries from scientific journals. http://www.ojose.com/

ISI Highly Cited A search tool to identify individuals, departments and laboratories that have made fundamental contributions to the advancement of science and technology in recent decades. http://isihighlycited.com/

Mind-Brain.com Forum Focuses on scientific and philosophical aspects of neurology, consciousness, artificial intelligence, poetry and politics. http://mind-brain.com/forum/