A little customization of WxMaxima can make it much more useful for engineering calculations. I like WxMaxima because of the interface and that it starts up fast. For users of MATLAB and other engineering math software some things can be tedious. I have an initialization file that adds a few very useful functions for Engineering.
Engineers use degrees instead of radians. MATLAB has functions that simplify using degrees by appending a 'd' to the function name. Engineers often use vector dot and cross products which are not intuitive in maxima. Here is my WxMaxima startup file which is located in ~/.maxima/wxmaxima-init.mac which adds trigonometric and vector functions.