For the Western Christian interested in comparative studies: Investigating Islam
http://www.islamic.org.uk
Ask a question on Islam: http://www.whyislam.org/
An educational site on Islam: http://islam101.com/
A brief illustrated guide to understanding Islam: http://www.islam-guide.com/
A site about Muhammad (pbuh) his life and message: http://muhammad.net/
The true Gospel of Jesus: http://barnabas.net/
The Crusades from an Islamic and historical perspective http://crusades.org/
A collection of sites by Yusuf Estes an ex-Christian Preacher & Former Catholic Priest http://www.shareislam.com/