For a basic introduction to Buddhism, Wikipedia is a good place to start. Dharmanet International explains the basics of Tibetan Buddhism.
 
Many resources are available online for those who want to learn more about Tibetan Buddhism. Here are some of them:
 

Buddhism Resources

 
Ashoka Study Center
Ashoka offers online courses in all aspects of dharma, for both beginners and experienced practitioners.
 
buddhanet.net
BuddhaNetis an outstanding resource for the Buddhist community. It is a non-profit, non-sectarian organization that offers its services to all Buddhist traditions and helps make the Buddha's teachings freely available to all. A World Buddhist Directory, an ezine, and a library of free eBooks are just a few of the many fine resources at BuddhaNet™.
 
The Buddhism Guide
The Buddhism Guide provides extensive information about Buddhist history, culture, schools, temples, karma, meditation, and many other related subjects. You'll find
 
Buddhist eLibrary
This Digital Resource Library is an initiative of BuddhaNet.net in partnership with Mahachulalongkorn Buddhist University (MCU) and the International Buddhist College (IBC). It offers eBooks, images, audio, and video.
 
Namgyal Monastery
Namgyal Monastery in Ithaca, New York, is the North American Seat of His Holiness the 14th Dalai Lama. The monks from this monastery are well-known for creating sand mandalas.
 
bobthurman.com
Robert Thurman co-founded Tibet House, is a long-time friend of the Dalai Lama, and is a professor of Indo-Tibetan Buddhist Studies in the Department of Religion at Columbia University. Thurman is the author of Why the Dalai Lama Matters: His Act of Truth as the Solution for China, Tibet and the World and more than 20 other books.
 
Shambala Sun Magazine
The Shambhala Sun is a well-known and respected Buddhist magazine. It offers authentic teachings from the Buddhist and other contemplative traditions, and applies the wisdom born of meditative practice to all the important issues in life. See Shambala Sun articles related to Tibetan Buddhism.
 
Foundation for the Preservation of the Mahayana Tradition (FPMT)
The FPMT transmits Mahayana Buddhist tradition and values worldwide through Tibetan Buddhist teachings, meditation, community service, retreat centers, and projects that preserve the tradition. FPMT is based on the Gelugpa tradition of Tibetan Buddhism.
 
Office of Tibet
The web site of the Office of Tibet, the official agency of His Holiness the Dalai Lama in London, provides information about the different traditions within Tibetan Buddhism, along with other information about Tibetan Buddhist practices and symbols.
 
HH the Sakya Trizin
The Sakya tradition is one of the four major Buddhist traditions of Tibet. The web site contains information about the Sakya Trizin's teachings and programs and background information about the Sakya tradition. (Photograph above: the Sakya Trizin with Indian Prime Minister Nehru, courtesy His Holiness' web site)
 
The Stupa Information Page
The place to learn more about the stupa (chorten), as well as opportunities to sponsor, build, repair and maintain stupas throughout the world.
 
A Buddhist monastery and nunnery in the Tibetan tradition located on Kopan hill, overlooking the Kathmandu Valley in Nepal.
 
A Buddhism portal that hosts chats and forums for various Buddhist tradition and that offers guides and other Buddhist information and resources.
 
This project provides education and support to nuns and nunneries in India and Nepal from all Tibetan Buddhist lineages.








    Above: Namgyal monk creating a sand mandala; photo Namgyal Monastery



    The Dalai Lama



    Eight Auspicious Symbols



    Reaching Nirvana on PBS