Zephyr: Tools for a National Compiler Infrastructure Zephyr philosophy: build compilers from parts, which might include front ends, back ends, optimizers, and the glue that holds all these pieces together. You might even generate parts automatically from compact specifications. http://www.cs.virginia.edu/zephyr/

SUIF Compiler System Extensible system that supports parallelization, object-oriented programming languages, scalar optimizations and machine-specific optimizations. http://suif.stanford.edu/

Catalog of Compiler Construction Tools The resource overview includes compiler construction kits, lexer and parser generators, attribute grammar systems, transformation tools, front- and back-end generators, program analysis and optimization, environment generators, infrastructure/components/tools and compiler construction with Java. http://catalog.compilertools.net/

CoSy compiler development system The CoSy product is a flexible compiler development system for languages like C, DSP-C and Java, enabling architecture and compiler developers to generate and reconfigure efficient and robust compilers quickly for their existing and future cores. http://www.ace.nl/

The Mozart Development Environment a set of APIs and a file format that allow various development tools such as compilers, editors, class browsers and others to exchange data and cooperate. Currently, Mozart parses and "renders" only Java, although internally it is language neutral. http://mozart-dev.sourceforge.net/

The LLVM Compiler Infrastructure Project A compiler infrastructure designed for compile-time, link-time, runtime, and "idle-time" optimization of programs from arbitrary programming languages. LLVM is written in C++. It currently supports compilation of C and C++ programs, using front-ends derived from GCC 3.4 to SPARC v9 and X86 architectures, a back-end which emits C, and a Just-In-Time compiler for X86 and SPARC v9 processors. [University of Illinois Open Source License] http://llvm.cs.uiuc.edu/

Free Compiler Construction Tools List of lexers, parser generators, code optimizers (optimizer generators), and other compiler construction kits. http://www.thefreecountry.com/programming/compilerconstruction.shtml

Relational Meta-Language (RML) Generation of efficient compilers and interpreters from Natural Semantics Specifications. Semantics for real programming languages like Java, Pascal, Modelica were developed. http://www.ida.liu.se/~pelab/rml

PFX A tool to create compilers, assemblers, linkers for a range of targets. Special emphasis will be on embedded systems. In development. http://pennware.com/language/

The GENTLE Compiler Construction System Supports language recognition, definition of abstract syntax trees, construction of tree walkers based on pattern matching, smart traversal, simple unparsing for source-to-source translation, and optimal code selection for microprocessors. http://gentle.compilertools.net/

JACCIE Java-based Compiler-Compiler in an Interactive Environment. http://www2-data.informatik.unibw-muenchen.de/Research/Tools/JACCIE/

Zngr L compoiler Zngr L Compiler compile the theoretical language L, which is used as a simple language for teaching computation theory http://zngr.atspace.com/menu/zngrlcompiler.html