JAYI - Just Another Yacas Interface is an interface for the computer algebra system Yacas. JAYI is based on WxMaxima design, and is a GUI for Yacas computer algebra system instead of maxima. JAYI provides menus and dialogs for many common yacas commands. JAYI is distributed under the Apache license. JAYI also consist of JAGPI - Just Another GnuPlot interface to plot graphs (2D/3D).
As can be seen in features, JAYI interface with Yacas Computer Algebra System using RYacas. So, to use JAYI...