Wormhole is BETA (2). It's pretty good to use for a number of parsing tasks (I do), but don't be surprised that it won't do everything for everybody.

Wormhole is a parser generator with a philosophy that the best parser generator is one that makes it easy for you to make a parser, and makes it easy to clean up grammar ambiguities.

The Feature List:

• LR parser generator.
• Grammar pruning makes cleaning up ambiguities easy.
• Optional notation (make certain parts of productions optional).
• Semantic actions.
• Reduce tests (run time reduce disambiguation).
• Built in lexer generator with unicode support.
• Multiple token sets, divided into lexer set states.
• Lexer push a lexer set state, pop and set actions.
• Integrity check on lexer actions and suggestions on fixing them.
• Interactive grammar analyzer (not an editor, yet).
  • Browse rules
  • Browse states
  • Browse conflicts
  • Reduction cause explanation (FOLLOW set analysis).
  • Search for Ambiguities.
  • Ambiguities check on a specific input.
• Multiple output languages, easily extensible to handle more.

Get Started

• Download and Install
• FAQ
• Learn Wormhole by example
• Learn Wormhole by numbers

Development Roadmap:

• The roadmap

More Documentation

• Wormhole command line usage
• The Wormhole input file reference

Parser Theory

• Context free grammars
• All about LR parsers
• The modified Wormhole goto and closure operations
• Figuring Out LR conflicts without pulling your hair out

Documentation about the wiki, that came with the wiki:

• Wiki FAQ
• Wiki docs
• Creating a new wiki page
• CVSTrac docs