"DOSBox is a DOS-emulator portable (and ported) to many platforms. A port was made feasible by the implementation of SDL on OS/2."
Info:
http://de.wikipedia.org/wiki/DOSBox
Small version:
ftp://ftp.netlabs.org/incoming/dosbox_small_0_66_rc1.exe
Sources:
ftp://ftp.netlabs.org/incoming/dosbox_sources_0_66_rc1.exe
-> URL: ftp://ftp.netlabs.org/incoming/dosbox_full_0_66_rc1.exe
Source: OS2.org