This is my personal collection of modules for VCV Rack: feel free to use them and modify them as you wish. If you find them useful, feel free to get me a beer.
Tension is a fixed voltage generator: you turn the knob, you change the voltage. Useful when playing with logic chains or if you need to power up a virtual lamp ;) .
Function is a function generator; it outputs the 3 conic section functions you learned in high school: ellipse, parabola and hyperbola. Input voltage acts as the x variable, while the knob is a constant parameter.
Perlin is a Perlin noise generator. It comes with noise speed knob and an amplitude knob. Each knob has its own voltage input with small knob to balance the effect of the signal.