Desmos Graphing Page
This is a full-page version of a
graphing calculator. It also automatically highlights important points
like intercepts, extremes (maxima and minima), and intersections if you
graph more than one equation.
CalcChat
CalcChat has worked out solutions to all the odd-numbered problems in the calculus book. (Be sure you've selected the correct textbook, and use the dropdown menus at the top of the page to navigate to the problem you are working on.)
CalcChat page for AP Calculus