Master & Margarita
http://www.masterandmargarita.eu/en/index.html
This website by Jan Vanhellemont of Belgium not only provides in-depth descriptions of almost every allusion in the novel, but includes extensive historical context and recent news pertaining to Bulgakov and The Master and Margarita.
Bulgakov's Master and Margarita
http://cr.middlebury.edu/public/russian/Bulgakov/public_html/index.html
This site has a helpful time line of all the important events in the story, maps of the specific places mentioned in Moscow and elsewhere, character descriptions, and allusion explanations.
Mikhail Afanasjevitch Bulgakov
http://bulgakow.chkebelski.de/texts_e.html
This site provides translations of certain excerpts in Russian, German, and English.
