Alternatives to Flex for all platforms with any license

  • ANTLR

    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 OS X Windows Linux

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    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
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