You can right-Click and Save the TI files so you don't have to type them in yourself. You'll need to get the free TI Connect Software from education.ti.com.
My calculator recommendations are here

# St Francis Picture

Store as Pic1 and use in the StartUp App
to see it everytime you turn on your Calculator

Pic1.8xi
# AMAT

This is a handy progrma for doing Gaussian Elimiation
with the TI-83 or 84

AMAT.8xp

Makes a function to curve a test. Input the before and after grades for two, and it stores the linear function in Y_{1}
Use the TABLE or the GRAPH to see the transformation for any score.

CURVE.8xp

Simplifies a radical

# LAW

Law of Sines and Cosines

LAW.8xp

LAW89p

# INVNRM82

The TI-82 does not have an InvNorm function, so this will do the trick:

# NORM.8xp

NORM.8xp

A Handy Menu program for Normal curve stuff from your TI-83 or TI-84

Click here for more info.

# Finance Programs

Here is a Zip file with all the programs described at here
# Crypto

CRYPTO.8xp