ABoP (25 L-systems) — The Algorithmic Beauty of Plants by P. Prusinkiewicz and A. Lindenmayer, http://algorithmicbotany.org/papers/#abop

Plants (19 L-systems)

FASS (12 L-systems) — Space-filling, self-avoiding, simple and self-similar curves.

3D (11 L-systems)

plant (5 L-systems)

random (3 L-systems)

Animation (3 L-systems)

Tilings (2 L-systems)

ASCII (2 L-systems)

FAAS (1 L-systems)

cool (1 L-systems)

.sathi (0 L-systems)

abstract (0 L-systems)