'Dos Box', and 'Aiglon Process Killer'

Dos Box

DOSBox emulates an Intel x86 PC, complete with sound, graphics, mouse, modem, etc., necessary for running many old DOS games that simply cannot be run on modern PCs and operating systems, such as Microsoft Windows 2000, Windows XP, Linux and FreeBSD. However, it is not restricted to running only games. In theory, any DOS application should run in DOSBox, but the emphasis has been on getting DOS games to run smoothly, which means that communication, networking and printer support are still in early development.

http://dosbox.sourceforge.net/news.php?show_news=1

Aiglon Process Killer

Kill any application using a double-click, or kill bad programs automatically. Works like an anti-virus.

http://www.aiglonsoft.com/