I will add to this as I find more resources. If you find something useful, please let us know!

Using TI-84 for binomial probability: [pdf]

Other TI graphing calculators probably work similarly.

Here is a resource that discusses many useful computations for probability and statistics on TI-84, including finding binomial and Poisson probabilities:

For the Casio fx-9750gii Power Graphic calculator, here is a comprehensive guide to statistics and probability functions.

If you are using a calculator not listed above and these instructions don’t help, let me know!