Choice Optimizer
This application is designed to make it easy to place people into their top choices, subject to any specified constraints. Perfect for school admins, summer camps, and anyone else who had to do the previously difficult task of trying to make sure everyone gets the best outcome possible in a mathematically optimal way. (That is sure to disappoint everybody!) Note that this demo is limited to 1,200 cells; for larger data sets, contact me on Github or run the app yourself.