French developer GeeckoDev is back with a homebrew release for the PSP, to add on to his collection and yours too.
gPlot++ is a function plotter for your PSP. It can plot and display 4 concurrent functions and allows you to move them around through zoom and panning. It can output an array of predefined functions such as the trigonometric ones. It can serve as a nifty, colorful substitute to your graphic calculator. Take a look at the screenshots below to grasp an idea of what this could do.