The Ticalc.org Project
This is the best organised site for all TI8X and TI92 calculators. You will always find the newest programs and the best information files on this site. This site is more than worth a daily visit. Go here to download programs or to get quality information.
(and I am not saying this because this site is hosted at ticalc.org)
This is the official page for the CrASH shell and other products released by the CrASH authors.
The Official ASH page
This is the official ASH homepage, maintained by Dines Justesen. It contains the latest ASH version and some useful documents on how to program the TI-82. There is also an Ash school (translated from the 85's Zshell school).