A simple graphing calculator which plots parametric equations of the form x(t) and y(t). The plot area is automatically scaled to fit the plot while remaining centred at the origin. Hitting Ctrl-p saves a screenshot with a randomized filename.

Source

Github

A simple utility to return the ASCII integer code corresponding to the key that was pressed. This is useful if you don't know what the code for, say, one of the arrow keys or something is.

Source

Github

A simple tone generator where the tone can be selected using the up and down arrow keys on the PicoCalc. Hitting 'q' quits.

Source

Github

A basic snake toy. The snake is represented by a series of boxes, each move as independent sprites, which can be driven around the screen using the PicoCalc arrow keys. Hitting 'q' quits. When the snake collides with the wall, or itself, it beeps and turns the head of the snake red. Using the arrow keys it can still be driven around, once it is no longer colliding with anything the red square will turn yellow again.

Source

Github