Here are some insightful websites about Mikhail Bulgakov, his "Master and Margarita", Russian theater greats, etc. 

Kaisyn Kouliev - great Balkarian-Russian author, poet and humanitarian

www.masterandmargarita.eu   - a multilingual site by Jan Vanhellemont. 

Master and Margarita - the complete text of the novel in the original Russian version

Master and Margarita - the complete text of the novel in the 1997 English translation

Master and Margarita - a website conceived as a project for the 1998 "Davis winterterm workshop" at Middlebury College.