FADS
FADS (or "Fails At Drawing Smoothly") is a graphing calculator written for curses-compatible terminals.
Installation
Right now the build process is pretty simple. After cloning, run make to build and make install to install to /usr/local after building.
In order to build, FADS requires that GCC can link against 'ncursesw.' If the build process fails for this reason, see this stackoverflow post to see how to install the ncursesw development library.