Alternatives to Flex for all platforms with Free License


    ANTLR, ANother Tool for Language Recognition, is a language tool that provides a framework for constructing recognizers, interpreters, compilers, and translators from...

    Free Open Source Mac Windows Linux

    ANTLR icon
  • Ragel

    Ragel is a finite-state machine compiler and a parser generator targeting C, C++ and ASM. It can recognize byte sequences and execute code at arbitrary points in the...

    Free Open Source Windows

    Ragel icon
  • Owl parser generator

    Owl is a parser generator which targets the class of visibly pushdown languages. FEATURES: Efficient — Owl can parse any syntactically valid grammar in linear...

    Free Open Source Mac Windows Linux

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    Owl parser generator icon
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