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 process.
Cost / License
- Free
- Open Source
Platforms
- Windows

Flex is described as '(fast lexical analyzer generator) is a tool for generating scanners. A scanner, sometimes called a tokenizer, is a program which recognizes lexical patterns in text. The flex program reads user-specified input files, or its standard input if no file names are given, for a' and is an app. There are four alternatives to Flex for Windows, Linux and Mac. The best Flex alternative is Ragel, which is both free and Open Source. Other great apps like Flex are ANTLR, Owl parser generator and textX.
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 process.

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
Owl is a parser generator which targets the class of visibly pushdown languages.
textX is a meta-language for building Domain-Specific Languages (DSLs) in Python. It is inspired by Xtext.
It will help you build your textual language easily. You can invent your own language or build a support for an existing textual language.