Scientific article search and order engine, a service provided by Institut de l'Information Scientifique et Technique (INIST) of Centre National de la Recherche Scientifique (CNRS), France.

Scientific literature digital library and search engine.

A search tool to identify individuals, departments and laboratories that have made fundamental contributions to the advancement of science and technology in recent decades.

Allows researchers worldwide to collaborate, manage projects, stay informed about the latest research developments in their subject specializations, and use specialist tools to help them with research.

A multi-search tool that permits queries of a number of scientific journals.

A science search engine, which pulls data from scientific web sites.

Scientific search engine and online forum. Researchers and students can search the scientific literature and can freely and anonymously discuss and review research articles.

Search engine that fetches only scientific websites.

A search which uses multilateral partnerships to search national and international databases.

Yahoo! Search helps users find information, news, images, video, products, local services, and answers from around the Web.

Google allows users to search the Web for images, news, products, video, and other content.

Dogpile fetches and ranks results from multiple search engines, letting you search for key words, pictures, audio, video, news, or phone numbers from a single page. ...

Bing is Microsoft's search engine, formerly Windows Live Search and MSN Search, bing offers Web search and image search as well as videos, shopping, news, maps, and ...

AltaVista provides web and newsgroup search engines, as well as paid submission services.

Metasearch results from popular engines and directories, including Google, Bing, Yahoo!, and Ask.