Free Compiler Construction Tools

Question

http://www.thefreecountry.com/programming/compilerconstruction.shtmlFree Compiler Construction ToolsIf you are thinking of creating your own programming language, writing a compiler or interpreter, or a scripting facility for your application, or even creating a documentation parsing facility, the tools on this page are designed to (hopefully) ease your task. These compiler construction kits, parser generators, lexical analyzer / analyser (lexers) generators, code optimzers (optimizer generators), provide the facility where you define your language and allow the compiler creation tools to generate the source code for your software.
If you want a hard copy book on compiler construction, you might want to check out the following famous and frequently recommended books:
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