An infrastructure for writing source-to-source compilers for C, C++, or similar languages.

An extensible, simple to use, EBNF-oriented translator-generator.

Eli is a domain-specific programming environment designed to generate compilers for programming languages from specifications. Eli includes a vastlibrary with precoined solutions and reusable components and is Open Source.

List of lexers, parser generators, code optimizers (optimizer generators), and other compiler construction kits.

An Open Source project targeting a lexical analyzer generator for C++. Special features are sophisticated mode transitions and mode inheritance. The generator's output can be up to two times faster than output produced with the traditional 'flex' program.

An aggressive open-source compiler for C and C++ and Stacker, a forth-like language. It specializes in interprocedural optimization and analysis, and handles runtime and offline optimization "in the field" as well.

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.

Generation of efficient compilers and interpreters from Natural Semantics Specifications. Semantics for real programming languages like Java, Pascal, Modelica were developed.

Extensible compiler system that supports parallelization, object-oriented programming languages, scalar optimizations and machine-specific optimizations.

Its 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.