Christian Singers of Germany: Martin Luther
From the book by Catherine Winkworth: includes biography and several translated hymns.
Deutsche Geistliche Lieder
http://www.worldwideschool.org/library/books/relg/christiantheology/DrMartinLuthersDeutscheGeistlich
Etext of German hymns, with English translation.
Did Luther use a drinking song as the basis for (A
FAQ including explanation of the term "bar form".
Luther, Walther, and the Wittembergisch Geistlich
Background on the musical theory and practice of the reformer and the musician. With brief biographies, and comments on the purpose of text, music, melody, harmony, and texture of hymns.
Martin Luther
Frank Manheim biography in the Classical Composers Database focuses on how the reformer revolutionized church music in the 16th century.
Martin Luther Collection: Sammlung
Complete text of his hymns in English and German with a short biography.
Martin Luther's Music
Article talks about translation and writing of new hymns and worship orders in order to more involve the laity and how this concept spread with the Reformation.
Selected Hymns of Martin Luther
Project Wittenberg archive with English translations and some texts in the original German. Two English versions of A Mighty Fortress are included.
The German Mass and Order of Divine Service
The 1911 translation of the 1526 Deutsche Messe with preface from the reformer, telling why he wrote it, its intended use, and various other rites and options for worship.
The Musical Reforms of Martin Luther
Shows the reformer's rationale in crafting a distinctly evangelical form of the Divine Service, giving insight into his role as compiler and composer of music with special emphasis on the Deutsche Messe. Includes MIDI audio files.