Access to Insight
American Theravada web-library offering many Sutta translations and articles and books for download.
http://www.accesstoinsight.org

Dharmanet
American Buddhist website for Buddhist practice and study. http://www.dharmanet.org

Buddhasasana  
An extensive collection of articles on Theravada. http://www.saigon.com:8081/~anson/ebud/ebidx.htm

Palikanon
German & English Theravada Site with some English books, etc, for download. http://www.palikanon.com/english/english_web.htm

Nibbana.com
Burmese Theravada Buddhism
http://www.nibbana.com

Association for Insight
Burmese Theravada Buddhism. Articles by Mahasi Sayadaw and Ledi Sayadaw, free Pali fonts, etc.
http://www.aimwell.org

Mahasi.org
Site of the Mahasi Center in Yangon
http://www.mahasi.org.mm/download.html

U Ba Khin.com
Site of Sayagyi U Ba Khin Memorial Trust
http://ubakhin.com/PUBLIC.html

Forest Sangha
Website of Ajahn Chah's western disciples, with links to Ajahn Chah tradition monasteries' websites, links to newsletters and Dhamma-talks of Ajahn Chah and his disciples.
http://www.forestsangha.org

Buddhist Society of Western Australia
The Buddhist Society of Western Australia is a Buddhist community connected to Ajahn Chah's Forest Tradition. Many talks of Ajahn Brahmavamso and other monks can be downloaded from here.
http://www.bswa.org/modules/news/index.php

Wat Pah Nanachat
Website of the International Forest Monastery in the tradition of Ajahn Chah in Thailand.
http://www.watpahnanachat.org

Metta Lanka
Sri Lankan Theravada Buddhist Website with the Pali Tipitaka and several other Pali resources for download.
http://www.metta.lk/

Beyond the Net
Sri Lankan Theravada Buddhist Website with talks for download, etc. http://www.beyondthenet.net

Ancient Buddhist Texts
Some translations of Pali texts, articles on prosody, etc.
http://www.ancient-buddhist-texts.net

Pali Text Society
Site of the Pali Text Society, which sells editions and translations of Pali works. http://www.palitext.com/

Sadhu Web links
Theravada Buddhist Web Directory and Portal. Links to many Buddhist sites and resources.
http://www.dhamma.ru/sadhu/modules/mylinks/

Vipassana Research Institute
Official website of Vipassana Research Institute, Igatpuri, India. Vipassana meditation technique as taught by SN Goenka.
http://www.vri.dhamma.org

Buddhanet
Buddhist Information and Education Network: Buddhist Studies, World Buddhist Directory, E-books, Dhammatalks, etc.
http://www.buddhanet.net

Theravadanet
Website of the German Buddhist Union.
http://www.theravadanetz.de/frameset.html

Arrow River Community
Website of the Arrow River Monastery in Canada.
http://www.arrowriver.ca

Verlag Beyerlein Steinschulte
Publisher of German language Theravada literature.
http://www.buddhareden.de/fr-katalog.htm