The abbreviations in the columns of the main index refer to the following editions of Luther's works:
"AE" = The American English Edition (also frequently referenced as "LW"):
Luther's Works,
Volumes 1-55 (1955-1986):
Jaroslav Pelikan, editor, Concordia Publishing House, St. Louis (vols. 1-30);
Helmut T. Lehmann, editor, Fortress Press (formerly Muhlenberg Press), Philadelphia (vols. 31-55);
Christopher Boyd Brown and Benjamin T.G. Mayes, editors, Concordia Publishing House, St. Louis.
Title List of New Volumes
"WA" = "Weimarer Ausgabe" (German for "The Weimar Edition"):
D. Martin Luthers Werke: Kritische Gesammtausgabe (Dr. Martin Luther's Works: Critical Collected Edition), Hermann Böhlau, Weimar. Later volumes published by H. Böhlaus Nachfolger. 121 vols., 1883-2009, including:
DB = Die deutsche Bibel (The German Bible), 15 vols.
Br = Briefwechsel (Correspondence), 18 vols.
TR = Tischreden (Table Talk), 6 vols.
"StL" = The St. Louis German Edition:
Dr. Martin Luthers Saemmtliche Schriften (The Complete Works of Dr. Martin Luther), Dr. Johannes Georg Walch, editor, Concordia Publishing House, St. Louis. 22 vols., 1885-1910 (Revision of 24 vol. 1740-1753 edition)
Online Sources
Wikipedia article on the Weimar edition - This has an excellent description of the work as a whole as well as a list of the individual volume titles.
www.lutherdansk.dk - A Danish site that not only has a list of the volumes of the Weimar edition and the original Walch edition, but also has links to the works themselves.
Project Wittenberg's Luther section - Twenty or so selected works of Luther's translated into English.
"Beggars All" Blog - A blog entry that has a very good description and partial list of contents of the Walch and the revised Walch ("St. L.") editions of Luther's works.
Concordia Publishing House Prospectus - A detailed description of the contents of the new series of volumes (56-82) being added to the American edition of Luther's Works by CPH.
therebelgod.com/Luther - Contents by volume (but without page numbers) of the American Edition and Weimar edition.
Information on the St. Louis edition - This comes from the “Back To Luther” Blog. The second part of this post has lots of valuable information on the St. Louis edition, including links for downloading many of its volumes in PDF format. Also here is a downloadable spreadsheet of Luther's works cross-referenced by the St. Louis edition, the American edition, the Weimar edition, and the Erlangen edition.
Martin Luther in English - Links to downloadable versions to many of Luther's works, including most of the 55 volumes of the American edition. Most of these links are to digitized volumes in the Internet Archive—it appears that to get full access to these volumes one first needs to register an account with the Internet Archive, which is free and can be done using your Google account, and then volumes can be checked out for 14 days. However, there are also many links here to HTML versions of works by Luther.Dr. Martin Luthers Sämmtliche Schriften - A page on a Dutch site that has links to every volume of both the original Walch edition (1740-1753) and the revised Walch (St. Louis, 1880-1910) edition. The links point to the fully digitized text of each volume - the St. Louis edition was digitized by Google (though it does not seem to be available separately in Google Books) and the original Walch edition by the Boston Public Library in a very nice color copy made available in the Internet Archive at http://www.archive.org/details/dmartinluthersso01luth. Both are in the Fraktur typeface. The Hathi Trust Digitized Library is another site that has a completely digitized version of every volume of the revised Walch (St. Louis, 1880-1910) edition.
Early editions of Luther's Works - A post on the excellent “Red Brick Parsonage” site that has links to digitized versions of not only the two Walch editions and the Weimar edition but also to earlier editions of Luther's works, some in both German and Latin: the Wittenberg, Jena, Altenberg, and Leipzig editions, as well as to other kinds of collections of works by Luther, such as the House Postils.