I found EVALDRAW which is a little programming environment mostly for fast prototyping. It includes a built-in compiler and text editor. You can easily put graphs on the screen: just type in the expression. “With Evaldraw, you can make graphs in any dimension (1D, 2D, 3D), animations, custom musical instruments, voxel models, and general purpose applications”. It also contains a text to speech generator.
I have some nostalgic feelings about this. Like in the times of BASIC, when you type in a command or a program, press run and you instantly see what you created.