I found huge cache of #DOS files. They are zip files of old programs, utilities, documentation, code examples, code libraries, you name it. It's called the Garbo FTP Archives and here is one mirror of it: ftp.lip6.fr/pub/pc/garbo/pc/
To get a good idea of what is there, download INDEX.ZIP, unpack it and you'll find a file with all the files in all the directories and a one-line description of each.

The files are split into dozens of folders, here are the folder descriptions: ftp.lip6.fr/pub/pc/garbo/pc/DI…