RetroArch is a frontend for emulators, game engines and media players.
MOROS: Obscure Rust Operating System
A Multiplayer Front-End Project
Local Terminal Emulator
a multiplatform, full-featured GameBoy classic emulator
Program and Game Manager for DOS
This is the program Dos-Box bundled with some old DOS malware to test
FreeDOS is an open source DOS-compatible operating system
Run DOS applications in Windows.
Automatically backup your saved games with optional cloud support.
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
an extremely buggy web app !