The best cryptography playground available
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PEG.js is a parser generator for JavaScript
Free data acquisition and data visualization cross-platform software
A fast JSON parser/generator for C++ with both SAX/DOM style API
C# lexer and parser
The newest free IDE for Pascal programming language
Another C++ based JSON Library (/w Parser/Generator/Navigator)
C#Prolog -- A Prolog interpreter written in managed C#
A LALR(1) Parser Generator for JavaScript written in JavaScript
Parser Generator based on Coco/R
A PEG based parser generator, with advanced features
A packrat parser generator for C
C-like language parser, bytecode generator and a VM
Object Oriented Parser Generator
Python WebServer Log File Analyzer