Programs made for/with QuickBasic (Visual Basic predecessor for MS-DOS) or Qbasic (cut-down Quickbasic version included in MS-DOS 5.0, MS-DOS 6.0, MS-DOS 6.2 y Windows 95).
You should be able to compile them with QB64. Beware, some of them (specially those including IN, OUT, POKE, PEEK or BEEP) could need special oldschool hardware.