- Internet Encyclopedia of Philosophy
A gateway resource that is an academic peer-reviewed resource. The site is arranged by alphabetical letter to group philosophers. Once a philosopher is selected, their works or a discussion of their works, theories, and concepts can be clicked on and viewed.
- Noesis-Philosophical Research Online
A limited and controlled search engine providing academic, scholarly philosophical journals, reference resources and associations on the web under one website.
- Philosophy Books and Texts on the Net
Provides links to online texts and works of major philosophers that would be discussed and analyzed in college philosophy courses.
- PhilPapers: Online Research in Philosophy
PhilPapers is a directory of online philosophical articles and books by academic philosophers.