Tutorial in Lex and Yacc, tools that simplify compiler construction.

A retargeting of bison-1 and flex 2.3 to C++ capable of generating classes. As with Bison and Flex these two tools are independent but designed for mutual compatibility. Examples are provided to help in getting started.

The version of BtYacc on siber.com suffers from a few minor, but annoying bugs. This is a page with patches.

A modified version of yacc that supports automatic backtracking and semantic disambiguation to parse ambiguous grammars. It also has syntactic sugar for inherited attributes.

Coco/R combines the functionality of the well-known UNIX tools lex and yacc, to form an extremely easy to use compiler generator that generates recursive descent parsers, their associated scanners, and (in some versions) a driver program, from attribu...

a scanner+LL(k = 1..Inf) parser generator for C++. Allows easy top-down description of grammars in an intuitive and extensible manner. Good generated code speed (as comared to GNU Flex/Bison). [Open source, GPL]

A simple to use translator generator.

A general-purpose parser generator that converts a grammar description for an LALR context-free grammar into a C program to parse that grammar. [Open source, GPL]

A fast lexical analyser generator. It is a tool for generating programs that perform pattern-matching on text. There are many applications for Flex, including writing compilers in conjunction with GNU Bison. [Open source, GPL]

Various GNU tools and software for Win32 including ports of bison, byacc, and flex