For years I have created programs for calculators, from the ti-83 to ti-84 plus ce and even the titanium. And from programming in BASIC to Assembly. Here are the programs that I have uploaded to ticalc.org. The biggest program by far is "ATOMSLAB" which I created for AP Chemistry with all solvers and math devices needed for chemistry and even some organic chemistry drawers and solvers. It regularly is used in colleges across the world and also by high schoolers.