A collection of articles on progressive Islamic theology, by Zeeshan Hasan.
A Wikipedia article discussing the emergence of modern liberal groups within Islam.
A collection of liberal articles by Dr Muqtedar Khan, on Islam and politics, particularly covering issues affecting Muslims in America. Includes details of his publications, and his blog, musing on global affairs.
A book edited by Charles Kurzman, of the University of North Carolina; includes brief details, and extensive links.