Index to the works can be found here: http://www.npj.com/bach/BG.html
Access through IMSLP:http://imslp.org/wiki/Bach-Gesellschaft_Ausgabe
Full Vocal Parts with Piano Accompaniment
They also offer an audio stream of his works:http://www.poonhill.com/audio.html
The complete works of Mendelssohn available digitally from the Bavarian State Library.
Digital reproductions of more than 500 music autographs and life documents by Franz Schubert.