- The Complete Work of Charles Darwin Online – Complete publications, private papers, manuscripts, illustrations, bibliography of related works, and more.
- Darwin Correspondence Project – Full texts of more than 6000 of Darwin’s letters.
- Charles Darwin's Library – A digital edition and virtual reconstruction of the surviving books owned by Charles Darwin. Also provides full transcriptions of his annotations and marks.
- Darwin's Plants from the Beagle Voyage – Herbarium sheets of plants collected by Darwin.
- Galápagos Mockingbirds – Species information, bibliography
- Charles Darwin Foundation – An international not-for-profit organization that provides scientific research and technical information and assistance to ensure the proper preservation of the Galapagos Islands.