Google is the number one
search engine, followed by Bing.
Find out more about how to use Google in the
Google Power Searching Tips for Students and Universities guide.
The following search engines and directories can help you find high-quality websites and will often give more focussed results than Google. For more specific advice, or if you can't find what you're looking for, contact the Subject Librarians, or Ask for help, or try searching in other databases, or check our Subject Guides. There's also a short and easy search engine tutorial available from Pandia.
There's also this helpful blog
Ten science search engines.
Scirus lets you to search for not only websites but also journal content, scientists’ homepages, courseware, pre-print server material, patents and material in institutional repositories.
helps you find the best websites, and also articles, books, the
latest industry news, job announcements, technical reports,
technical data, full text eprints, the latest research, thesis &
dissertations, teaching and learning resources and more, in
engineering, mathematics and computing.
Pinakes: a subject gateway, lists high-quality subject gateways on a number of subjects.
DMOZ Open Directory Project is the largest, most comprehensive human-edited directory of the Web.
Intute Best of the Web. A database of hand selected Web resources for education and research.
The WWW Virtual Library. A
compilation of key links for particular subject areas.