Five Criteria for Evaluating Web Pages
This link provides a straightforward approach to evaluating web pages. Look for accuracy, authority, objectivity, currency, and coverage, and remember to evaluate web pages critically!

Check the Search Engine Watch Web site for a wealth of timely information concerning search engines such as search techniques, guides, reviews and news. Or review these Search Engine Search Techniques and Boolean searching for ideas on improving your search results.

DOAJ
The aim of the Directory of Open Access Journals is to increase the visibility and ease of use of open access scientific and scholarly journals thereby promoting their increased usage and impact.The Directory aims to be comprehensive and cover all open access scientific and scholarly journals that use a quality control system to guarantee the content.

INFOMINE A search engine/index of WWW sites. Browse by subject, title or keyword in the following subject areas:

• Biological, Agricultural and Medical Sciences
• Business and Economics
• Cultural Diversity
• Electronic Journals
• Government Information
• Maps and GIS
• Physical Sciences, Engineering, Computing and Math
• Social Sciences and Humanities
• Visual and Performing Arts

Oaister
OAIster is a project of the University of Michigan Digital Library Production Service. Their goal is to create a collection of freely available, previously difficult-to-access, academically-oriented digital resources that are easily searchable by anyone.

Google Scholar
Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations.

Scirus
Scirus is the most comprehensive science-specific search engine on the Internet. Driven by the latest search engine technology, Scirus searches over 250 million science-specific Web pages, enabling you to quickly:
• Pinpoint scientific, scholarly, technical and medical data on the Web.
• Find the latest reports, peer-reviewed articles, patents, pre prints and journals that other search engines miss.
• Offer unique functionalities designed for scientists and researchers.

Academic Info - subject directory for college students and faculty; subjects range from African American History to Zoology.

BUBL Access the finest Internet "gateway" sites. Browse by subject discipline, subject heading or search by keyword.

Internet Public Library Created by Librarians, this page provides subject access to Internet sources & a search engine to access them.

Librarian's Index to the Internet - A searchable, annotated subject directory of more than 7,500 Internet resources selected and evaluated by librarians for their usefulness to users of public libraries.

Open Directory A Web Directory compiled by subject experts.  Not as extensive as Yahoo!, but it is quickly growing. Try it!

CurryGuide
Meta search engine for the US and several European countries, as well as in various subject areas. Has ability to save your results for easy rerunning at a future point.

Dogpile
Popular metasearch site owned by InfoSpace that sends a search to a customizable list of search engines, directories and specialty search sites, then displays results from each search engine individually.

Kartoo
If you like the idea of seeing your web results visually, this meta search site shows the results with sites being interconnected by keywords.

Vivisimo
Enter a search term, and Vivismo will not only pull back matching responses from major search engines but also automatically organize the pages into categories.

AltaVista

Google

Yahoo