Awklisp

made by darius, submitted by davidbalbert
A Lisp written in Awk. Written and posted to Usenet in 1994. Updated in 2001 with garbage collection. The repository contains a bonus Lisp written in Perl.

Parson: A PEG parser combinator in Python

made by darius, submitted by nicholasbs
This library includes many excellent examples, ranging from a JSON parser written in only 30 lines of code to a working BASIC interpreter.