I may be adding more this list as time progresses. If anyone knows of a work that needs to added here, please PM me with the information. -- Ronald.
The Herald site contains several commentaries on Revelation: www.heraldmag.org/olb/contents/bsllinks/Commentaries.htm The Expanded Comments for Revelation often contains comments from Brother Russell, but many of the comments in Revelation are from Brother Mann. John Meggison's Notes also contains comments on Revelation. One may download these works by right clicking the links.
The Bible Students Library DVD has a few more than what is found on the heraldmag.org site. heraldmag.org/cdromad.htm