- Scirus
 - Searchable directory of scientific information. Provides access to web listings and articles from journal sources. - SciCentral
- Links to sites in the fields of science, medicine, and engineering, and to current scientific news articles.
- Science.gov
- Gateway to authoritative science and technology information provided by U.S. government agencies, including research and development results.
- Hypography.com
- A collection of user-submitted science and technology links.
- SciNet
- Science and technology search engine with science articles and consumer electronics reviews.
- TechExpo
- A directory of technology and engineering sciences.
- Connotea
- Free online reference management service for scientists to store or share articles and links.
- 100 Top Science Sites
- Science page of the website 100.com
- Uzbekistan Science Network
- The scientific and educational network of Uzbekistan.
 Scenta
- Works with leaders in the science, engineering, and technology (SET) world to provide a gateway to the best SET resources on the Web.- Buzzle.com: Science and Technology
- Offers resources, information, and articles related to science and technology.
- AtomDir
- Family friendly science and technology web directory. AtomDir offers free and paid advertising for quality science web sites.
- Scientific American Sci/Tech Web Awards (2)
- PSIgate: Physical Sciences Information Gateway
- Offers access to on-line resources in the physical sciences: astronomy, chemistry, earth sciences, materials sciences, physics, and general science.
- Sciencepost.info
- Searchable web directory in a number of languages.
- Skowronski's Science Connection
- Points to biology, chemistry, and physics resources as well as science education sites for teachers and students.
- Kosmix Science
- Kosmix Science allows members to organise and search for science-related information, news, and articles available online.
- TropHort - Life and Earth Sciences
- Offers links to websites and science articles in biology, applied life sciences, agriculture, horticulture, forestry, earth sciences, and environmental sciences.
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