Was not aware of #lang lindenmayer, very cool.

Some of the other, older language environments I've found are the C-based CPFG, C++-based LPFG, L-Py for python

http://algorithmicbotany.org/lstudio/CPFGman.pdf http://algorithmicbotany.org/lstudio/LPFGman.pdf http://algorithmicbotany.org/papers/lpy.fps2012.pdf