Parser generator to read, process, or translate structured text
JSON Parser written in C that outputs JSON into D-List list objects
Simple, fast, powerful parser toolkit for JavaScript
Parsing and analysis of Vertica, Hive, and Presto SQL
Free data acquisition and data visualization cross-platform software
PEG.js is a parser generator for JavaScript
Another C++ based JSON Library (/w Parser/Generator/Navigator)
C#Prolog -- A Prolog interpreter written in managed C#