Anders Transhuman Page- One of the first transhumanist sites and still very comprehensive. Features an introduction to transhumanism and five detailed topic areas: Individual, Global, Cultural, Technological, and Organizational.

The Advent Of Humanisation - Suggesting that the human race has a certain genetic potential - an inherent capacity to create a particular form of society - which is now close to realization.

Anarcho-Transhumanism - A synthesis of anarchism and transhumanism, centered on the attainment of political, economic, and biological freedom.

Betterhumans - News, articles, and links related to scientific advances in human improvement.

Extropy Institute - Transhumanist group which advocates using technology to extend healthy life, augment intelligence, optimize psychology, and improve social systems.

Future Human Evolution is a database of ideas and articles about the human future regarding to genetic engineering, artificial intelligence, transhumanism, emerging technologies, life extension, human evolution and enhancement." individual humans sharing multiple brains.

Homo Multifarius - Unique speculative perspective on the possibility of individual humans sharing multiple brains.

Mind Uploading - The putative future process of copying one's mind from the natural substrate of the brain into an artificial one, manufactured by humans.

Wikipedia: Category: Transhumanism - Definition, history, and various topics.

World Transhumanist Association - Explores possibilities for the "posthuman" future created by increased merging of people and technology via bioengineering, cybernetics, nanotechnologies, and other emerging innovations. Offers an academic journal, e-zine, FAQ, discussion lists, and references.