Qres has been discontinued. Similar apps include Display Changer, which has a free version. Other options are MultiRes. Between them they cover Windows.
Display Changer changes the display resolution, runs a program, then restores the original settings. It can also change the resolution permanently and rearrange the monitors in a multiple-monitor setup. This is useful for games and home theater computers.
MultiRes works very much like a 32-bit version of the venerable Microsoft QuickRes 16-bit applet for Windows 95, with administrative scripting facilities and extended capabilities to handle ClearType, refresh rates and multiple monitors.
