CPL mouse fix – This is a registry file for Windows that disables mouse acceleration. This was previously an option in Windows, but that was removed after XP. Useful for FPS games.
Display Doctor 7 – If you are using a virtual machine like VirtualBox to play old Windows games (Winows 95 or 98) this can be used to enable additional display options (higher desktop resolution etc).
Primary Lock – A program that will restrict a game or application to one monitor. Useful for running older games on a multiple monitor setup.