- American Society of Heating, Refrigerating and Air Conditioning Engineers
- American Society of Mechanical Engineers
- dmoz: Open Directory Project: Mechanical Engineering
This site says they are the "largest, most comprehensive human-edited directory of the Web."
- eFunda: Engineering Fundamentals
"eFunda stands for engineering Fundamentals. Its mission is to create an online destination for the engineering community, where working professionals can quickly find concise and reliable information to meet the majority of their daily reference needs."
This site states that it is "The world's most-visited engineering job site."
- Frank Potter's Science Gems: Engineering
Frank provides links to sites relevant to for students, teachers, scientists, and engineers. They are arranged by category, subcategory, and grade level.
- Galaxy: Mechanical Engineering
This site says it is "The Web's Original Searchable Directory."
This site "has been designed to be the perfect starting page for a mechanical engineer."
- Infomine: Physical Sciences, Engineering, Computing & Math
This site is a collection of "Internet resources relevant to faculty, students, and research staff at the university level" and is built by librarians. Links are provided to useful Internet resources including databases, electronic journals, electronic books, bulletin boards, mailing lists, etc.
- MatWeb: Material Property Data
This site contains datasheets on "thermoplastic and thermoset polymers such as ABS, nylon, polycarbonate, polyester, polyethylene and polypropylene; metals such as aluminum, cobalt, copper, lead, magnesium, nickel, steel, superalloys, titanium and zinc alloys; ceramics; plus semiconductors, fibers, and other engineering materials. Information on over 100,000 materials in included.
- Mechanical Design Resources
A partial list of the categories of links provided at this site includes: Materials, Components, Design Information, Patents, Publications, Engineering Sites, Safety, Finite Element, and Machine Shop.
- Online Ethics Center at the National Academy of Engineering
This center supports activities that address the "ethically significant issues that arise in engineering and scientific research, education, and practice. These issues arise for individual engineers and scientists as well as for social organizations and institutions." The site is an "electronic repository of resources on science, engineering, and research ethics, for engineers, scientists, scholars, educators, students, and interested citizens."
This award winning site serves as a gateway to scientific and engineering news sources.
This site is "is a free service which can help you find articles, books, the best websites, the latest industry news, job announcements, technical reports, technical data, full text eprints, the latest research, thesis & dissertations, teaching and learning resources and more, in engineering, mathematics and computing." It is sponsored by Heriot Watt University in the UK.
This website "lists products and services, directory information, brand names, and company catalogs."