The Internet Archive has an emulator for playing Nuclear War, an MS-DOS game from 1989.
software
Broderbund’s Ancient Art of War (1984)
The classic Ancient Art of War game, released by Broderbund in 1984, is available to play on archive.org in an emulator.
Gary Grigsby’s Pacific War Game Emulator
Gary Grigsby’s Pacific War was a lot of fun in the days of MS-DOS gaming. You can play it again on the Web Archive MS-DOS simulator.
Card Creator Software
Card Creator is a piece of software that helps you design your own Magic-style cards.