RideMax is a computer software program guaranteed to help you save time waiting in line at Walt Disney World and Disneyland.
RideMax allows you to specify the attractions you wish to ride during your visit, then uses a sophisticated scheduling algorithm to order your attractions so that the amount of time you spend in line is minimized. —Experience Disney Without the Long Wait! (ridemax.com)
What a great niche market! A classic entrepreneurial example of finding a void, turning it into a need, and filling it.
Thanks for another great suggestion, Rosemary.