TI Graphing Calculator Tutorials includes text and video demonstrating uses of the TI 83/84, 86, 89, & 92 models (provided through the Math Learning Center at Del Mar College, courtesy of Montana State University Academic Support Center).
TI Graphing Calculator Guidebooks--Links to download TI calculator manuals in PDF format.
Using the TI 83/84 Calculator--Topics and examples are tailored for students of college algebra, college trigonometry, and freshman calculus.
Graphing Calculator Help--Includes instructions for TI 82, 83, 85,86,89,92 and others.
Basic Graphing Functions for the TI-83 and TI-84, created by Jonathan Theile and Steve Saffell of the MWSU Center for Academic Support, explains how to enter a function equation on a graphing calculator, as well as how to find the y-intercepts, zeros (x-intercepts), and maximum/minimum. More math handouts are available from MWSU Center for Academic Support.
Calculator-1.com--basic, simple, scientific, root, and percentage calculator.
Desmos.com--Graph functions, plot tables of data, evaluate equations, explore transformations, and more.
Web2.0calc.com--Scientific, graphing, programming, equations, and units calculator; register to post questions in the math forum.
Meta-Calculator 2.0--Graphing, scientific, matrix, statistics, and programmer's calculator.
Cool Math's Graphing Calculator--This tool offers many features of hand-held graphing calculators. Text instructions are provided on the page.