life.c
click + drag to draw cells
epicycles.py
draw anything, even in several strokes
chaos_game.c
drag the corners
double_pendulum.ode
drag a bob, let go
dev/scope1 — x/y
drag across to scrub phase
rc_filter.sim
slide the cutoff
mandelbrot.glsl
hold to zoom, move to steer, right-hold out
sort.cpp
pick an algorithm, hit sort
resistor.bom
click a band (right-click goes back)
ripple_adder.v
flip bits, then peek at the gates