OpenExpert is handy utility letting users specify any number of suitable applications of there choice for each file type, this way, instead of being restricted to using a single pre-determined application, you can now easily choose from a list of suitable applications, this can be very handy at times, for example you want to do simple editing work on an image, instead of loading the default full fledged image editor like Photoshop you can load MS Paint using the Open With menu.