I particularly like calc mode. Top notch programmable rpn calculator with basic CAS support. Good for most algebraic transformations plus derivatives and integr

I particularly like calc mode. Top notch programmable rpn calculator with basic CAS support. Good for most algebraic transformations plus derivatives and integrals. It also supports graphing! Also you missed that you can run WebKit inside of emacs. Also you embed X apps in emacs and use it as a window manager.