INTERNET SEARCH ENGINES
Popular search engine run by Microsoft
Meta-search engines compile and sort results from multiple search engines.
Meta-search engine which brings together top results from Google, Yahoo!, and Bing
Meta-search engine which compiles top results from search engines like Google, Yahoo!, MSN Live, and Ask.com
CONTENT-SPECIFIC SEARCH ENGINES
Google's search engine for scholarly sources
Subject directories are resources for specific topics.
Academic Info Online Subject Guides
Large collection of subject guides for academic disciplines and specific research topics - list both online resources and printed reference works.
Provides access to a variety of web resources for research.
Internet Public Library (IPL2)
Collections of resources from the Internet Public Library (IPL) and the Librarians' Internet Index (LII).
Virtual Reference Shelf (Library of Congress)
Selected high-quality resources for research organized by subjects and categories.