QMC2 - is in its simplest, a front end for MESS, a multi-machine emulation program which can emulate a TI99/4a and quite a few other computer systems.
As a result of a flexible design QMC2 today is a multi-platform GUI front end for several M.A.M.E., M.E.S.S. and U.M.E. variants. It’s known to work on any modern Linux distribution, most UNIX derivates such as OpenSolaris or FreeBSD, on Mac OS X and Windows (XP, Vista and above).