Incredible?
If you live near a sizable library you might ask if they have a copy of
either "CDROMs in Print" or "The CDROM Directory." Both these contain
thousands of titles listed in a variety of ways. The directoroies cost
between $100-150, so they're not exactly a consumer item. BTW, the next
editions of both are likely to contain something like 5-6000 listings!
Rich Bowers