EgiticioYuncak.com

iburg, A Tree Parser Generator
Generates fast tree parsers for cost-augmented tree grammars. A variant of iburg is used in the code generators for lcc.
www.cs.princeton.edu/

SGLR: a Scannerless Generalized LR parser
Interprets parse tables generated from an SDF2 syntax definition. Scannerless means that no scanner is used to tokenize the input stream; the parse table contains enough information for both the lexical and the context-free syntax. [Open source, LGPL]
www.cwi.nl/

Elkhound: A GLR Parser Generator
Almost as fast as Bison (for deterministic portions of input), but can parse any context-free grammar. [Open source, BSD]
www.cs.berkeley.edu/

Toy Parser Generator for Python
TPG is a parser generator for Python. Given a simple attributed grammar, TPG produces a Python Recursive Descent Parser. It is simple and useful for small parsers of everyday life.
christophe.delord.free.fr/

The LEMON Parser Generator
Very simple LALR(1) open-source parser generator. Outputs C, claims to produce faster parsers than yacc/bison.
www.hwaci.com/

LLgen parser generator
A tool for generating an efficient recursive descent parser from an ELL(1) grammar. The grammar may be ambiguous or more general than ELL(1): there are both static and dynamic facilities to resolve the ambiguities.
www.cs.vu.nl/

Spirit C++ Parser Framework
An object oriented recursive descent parser generator framework implemented using template meta-programming techniques. Expression templates allow to approximate the syntax of Extended Backus Normal Form (EBNF) completely in C++.
spirit.sourceforge.net/

LRgen Lexer & Parser Generator from Parsetec
LRgen is an LALR parser generator and LALR lexer generator, featuring TBNF grammar notation and LALR lexers for parser and compiler development. The lexers and parsers both use the 4MPT technology.
parsetec.com/

Happy
A parser generator for Haskell.
haskell.cs.yale.edu/

The RDP parser generator
A parser generator which compiles attributed LL(1) grammars decorated with C semantic actions into recursive descent compilers.
www.dcs.rhbnc.ac.uk/