The definitive resource for L-Systems, this University of Calgary site is maintained by Lindenmayers collaborators. It contains many articles, and a full-length copy of 'The Algorithmic Beauty of Plants'.

A collection of papers related to using Mathematica to generate L-Systems.

Introduction to L-systems by Michael Frame at Yale University. Includes background information.

Generative art tools that create complex 2D and 3D objects breeding LSystems, Cellular Automata, and Shape Grammars. Freeware by Umberto Roncoroni.

A basic introduction to L-Systems with some colourful examples.

Windows software and some information on LSystems and related ideas.

A graphics tool for Lindenmayer systems in C and Java.

Overview of L-systems at Wolfram MathWorld. Includes supporting links and demonstration notebook.

Architectural applications of L-systems. Includes background and methods.

A simple implementation of Lindenmayer systems written in Python.