Top 5 turtle-graphics open source projects

A turtle graphics (a key feature of the Logo ) engine written in Swift.

A toy turtle graphics interpreter based on the Free monad, in PureScript, with HTML Canvas graphics support.

Tk-powered Ruby turtle graphics

L-System/LSystem component for A-Frame to draw 3D turtle graphics. Using Lindenmayer as backend.

openFrameworks addon that implements most of the string rewriting grammars described in the book "The Algorithimic Beauty of Plants"