Encyclopaedia of the Orient: Mandeans: Features history and beliefs.
Mandaean Calendar: Current Mandaean date. Dates of upcoming holidays. Convert any date to the equivalent Mandaean date(Java Applet).
Mandaean of Iran: Features history, texts, alphabet, and beliefs.
Mandaean Official Site: Features history, beliefs, forums, and links. In Arabic and English.
Mandaean Scriptures -- The Gnostic Society Library: Complete versions and some fragments.
Mandaeans of Iran and Iraq: Introduction to Mandaism and its cosmogony, cosmology and Holy-Days
Mandaeism - Wikipedia: Article on Mandaeist beliefs and related topics.