- Wikipedia
- A free encyclopedia built collaboratively using Wiki software.
- w3schools
- Tutorials for learning XML, HTML/DHTML/XHTML, CSS, XSL, JavaScript, ASP, ADO, VBScript, DOM etc.
- PhDs.org
- Graduate school rankings, jobs for PhDs, and science and engineering career resources.
- Mind Tools
- Learn skills of memory improvement, time management, problem solving etc.
- WebOpedia
- Search for computer and Internet technology definitions.
- MSN Encarta
- Microsoft's online encyclopedia.
- Britannica
- Britannica Online Encyclopedia.
- Invest Opedia
- A great source for investing education.
- Urban Dictionary
- The slang dictionary.