Although it has not previously been mentioned much on this website, the A. C. Gilbert Company also made HO trains for even longer than they made S gauge. Many of these HO models resemble closely their S gauge brothers, just HO scale. Dale Smith has a new website that indexes the Gilbert HO trains in a useful way, reducing the need to look though catalog pages if you are searching for a particular Gilbert HO piece. I know many of you also collect Gilbert HO along with your S, so I recommend you visit and bookmark The Gilbert American Flyer HO Index.
Now if someone would just create such a website to index S gauge trains. Now that would be a project!
Note: There are also Gilbert HO catalogs available for viewing in the catalogs section of this website.