| Balikpapan Orangutan Survival Foundation: Reintroduction program for confiscated orangutans on the island of Borneo. News, information, and images. |
| Orangutan Foundation International: The Orangutan Foundation International is comitted to saving orangutans through wildlife research, rainforest preservation, conservation and education. |
| Orangutan Health Project: Research project based in Sumatra investigating the use of medicinal plants by orangutans. Includes photo gallery and volunteer program. |
| Orangutan Sanctuary: Provides information and resources for professionals working to save the orangutan in rehabilitation sites and sanctuaries. |
| Orangutans in Borneo 2000: Promotes a trip to Borneo in August 2000 with the Orangutan Foundation UK. Contains details on orangutans and their background, geography, and plight. |
| Pongo pygmaeus: Information about the orangutan from the Animal Diversity Web. |
| Ralph Arbus's Gallery of Orangutan Photos: A large collection of photographs of orangutans of the Tanjung Puting National Park and Orangutan Care Center and Quarantine in Borneo. |
| The World of the Orangutan: Conservation information about the orangutan in Indonesia. In English, German, and Dutch. |
| WWF - Orang-utan: Biology and conservation issues. |
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