Athenus - The Engineering and Science Search Engine is a search engine which focuses upon sites whose content is primarily engineering and science related. It indexes the web, publications and news sites as well as maintaining a directory of relevant web sites.

Science search engines and technology search engines, plus top science news, from QuickSciTech, an Internet science, technology, and biomedicine directory and portal.

SciSeek is a great guide to the best the Internet has to offer in the fields of science and nature. Styled like a conventional Internet guide, this service lists Web sites covering subjects from agriculture and forestry to engineering, chemistry, physics

OJOSE, Scientific Search Engine, Wissenschaftliche Suchmachine, Moteur de recherche scientifique, where science meets the web

SciNet is the internet's premier science and technology search engine.

Scirus is the most comprehensive science-specific search engine on the Internet. Driven by the latest search engine technology, Scirus searches millions science-specific Web pages. Scirus has proved so successful at locating science-specific results on the Web that the Search Engine Watch Awards voted Scirus 'Best Specialty Search Engine' in 2001 and 2002 and 'Best Directory or Search Engine Website' Web Award from Web Marketing Association in 2004, 2005, 2006, and 2007

Learn common sense search engine marketing, viral marketing and customer outreach via social media and blogs. A free resource for small business.