L-system Explorer is a program used for viewing and creating L-system fractals. It have over 500 builtin L-systems (arranged into 20 or so groups) and ability to create and save your own L-systems (and groups). I suggest category app-sci, this ebuild depends on >x11-libs/gtk+-2.0 Reproducible: Always Steps to Reproduce:
Created attachment 23002 [details] lsysexp-0.67.ebuild
Very nice tool, but it seems unmaintained for a long time. Closing.