Wikimedia
Wikipedia: Tibetan Buddhism
Encyclopedia entry for Tibetan Buddhism, also called Lamaism, from the openly editable online encyclopedia Wikipedia.
Other
Dharma Haven: Tibetan Buddhism Resources
An overview of Tibetan Biddhism, with links to more information on teachings, texts, and similar subjects.
Other
Essential Introduction to Tibetan Buddhism
A site with detailed information on the various traditions within Tibetan Buddhism. Also contains information on basic Tibetan Buddhist practice.
Other
The Nyingma Tradition
A large page detailing all aspects of the Nyingma Buddhist tradition. Covers its history, its teachings and its major teachers.
Other
Dzogchen Monastery
A web site of a Nyingma tradition Tibetan monastery. Includes information of the history of the tradition, its teachings, its teachers, and its place in modern Buddhism.
University of Wisconsin
University of Wisconsin: South / Southeast Asia Guide
A university site from the University of Wisconsin with numerous hyperlinks to issues and information on South and Southeast Asia.
University of Missouri
Museum of Anthropology: Minigalleries: Symbols of Tibetan Buddhism
Examples of ritual and spiritual objects common to the practice of Buddhism in Tibet, including the prayer wheel.