Programming

ASM Foundry
TI-83+ assembly programming references, programs, and utilities. [Requires IE and JavaScript]
http://sureshotm6.tripod.com/

Assembly Tutorial
A tutorial on assembly language programming with language instructions, interruptions and file managing, macros and procedures, and program examples.
http://thsun1.jinr.ru/~alvladim/man/asm.html

Basic Guru Online
TI-83 and TI-83+ Basic online tutorials.
http://bgo.netfirms.com/

The Guide
Includes information on programming TI graphing calculators in assembly and in basic.
http://guide.ticalc.org/

Icarus Productions
TI calculator and Gameboy Color programs as well as z80 assembly language programming information.
http://icarus.ticalc.org/

Karma's Home
TI-82 assembly programming guide with lessons and tutorials.
http://karma.ticalc.org/

Legacy Calcware
A C programming group for the TI-89 graphing calculator.
http://kinchu0.tripod.com

Linux Programmer Group
Linux utilities for TI calculators, including GtkTiLink, a calculator linking program for both Windows and *nix systems.
http://lpg.ticalc.org/

SiCoDe
Former programming group with its assembly programs, mostly for the TI-83, available for download.
http://sicode.ticalc.org/

TI-GCC/Linux
C compiler for TI89/92+ calculators.
http://tigcc.ticalc.org/linux/