Johann Gottfried Walther: Biography, influences, major accomplishments, writings, and link to relationship with Johann Sebastian Bach from the Here Of A Sunday Morning radio program.
Johann Gottfried Walther (1684-1748): Biography including relationship to Bach, lack of deserved honors and recognition, and overall skill.
Kunst der Fuge | Johann G. Walther: MIDI files (freely downloadable).
Walther, Johann Gottfried: Biography: Article from Sojourn pages with links to Bach and other composers and to a glossary of terms.