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Delight is an imperative, object-oriented programming language with a Python-like syntax. Internally, it is based on the D programming language, and therefore supports classes, interfaces and templates, and compiles to efficient native code using GDC.
ParGeL is an LALR(k) parser generator, which allows creation of inheritable parsers in runtime and compile time environments. ParGeL is written 100% in Java.
Clojure is a dynamic programming language for the JVM. Note - current Clojure development has moved to Google code: http://code.google.com/p/clojure/ Project web site: http://clojure.org
Argus is a highly integrated Eclipse plug-in. The purpose of this plug-in is to add additional Errors and Warnings to the Eclipse Framework, assisting Java programmers to create bug free, high quality code.
Complete LALR(1) parser generator and engine in PHP.
Complete LALR(1) parser generator and engine (like BISON or YACC) but it's all done in PHP, and the input grammar is easier and more maintainable. Write your actions in PHP. Generate PHP output code. Drive your parser with PHP. Wanna make a language?
...Compiles efficiently to different platforms like distributed memory (MPI), shared memory multi-processor (pthreads), Cell BE processor, Nvidia Cuda, SIMD vectorization (SSE, Altivec), and sequential C++ code.
Dingo is a pluggable Schema Compiler for .NET and will generate C# code. The goal is to provide a simple way to generate Domain Objects. .NET XSD currently only generates Data Objects. Dingo can delegate code generation with high granularity.
openASN.1 is an Open Source Java toolkit for the Abstract Syntax Notation One (ASN.1) which consists of a compiler and codec with a low footprint runtime library.
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f2cpp is a python script to convert Fortran 77 to C++ code. The output files of f2cpp script, in contrast to the well-known f2c translator, can be easy read by human.
MeMo (stands for Meta-Model) is planned as Generic Programming Language & IDE, as flexible & smart as it is possible for computer application, including adjustable syntax, algorithm reduction. Ideally, it has to contain AI for interacting with the user.
Psyco showed that it is possible to execute Python code at speeds approaching that of fully compiled languages, by "specialization".
The project is now dead and replaced by PyPy: http://pypy.org/
CSP Canonical LR(1) Parser Generator. Includes lexer and parser generator. Supports all OS. Produces code as standard ANSI C++ w/ minimal STL and usable in commercial or non-commercial purposes.
More Than Parsing is a parser generator for context free grammars defined in a BNF-like format. It generates scanners, parsers, ASTs, etc. This sf project is no longer active, development will continue in a different place.
STDL (Structured test description language) is a domain-specific testing language that is used to auto-generate unit test code. It supports a myriad of output languages (incl. C#). The project's aim is that of reducing the resources required for testing
JUndo is a declarative object-oriented programming language with functional, and intensional programming characteristics. Applications include multi-level undo and sophisticated error recovery. See http://verdantium.blogspot.com/
froofyJIT is a C++ 'syntactic sugar' front-end for Paolo Bonzini's GNU lightning library for dynamic native code generation. It allows GNU lightning instructions to be expressed in a more concise way that approximates a 'real' assembly language.
Jo2 (Java Operators Overloading) :: is Javac (Sun Java Compiler) extended by operators overloading. This open java project comes with a specification of operators overloading in Java. The resulting byte code obeys to the java standard specification.
IDC is an interactive decompiler, where the user starts with an almost literal translation of Assembly code in C language, which he progressively decompiles by the successive application of low-level refactorings, ultimately leading to high-level C code.
TreeDL (Tree Description Language) is a notation for tree structures used by programs (like syntax trees) and tool for translation of tree descriptions to target programming language, docs generation, etc. Tool's functionality can be extended by plugins.
The Tree Processing Language allows the specification of an object oriented tree structure, with strong seperation of concerns, which can be compiled into a type safe class hierarchy implementing the tree.
A compiler and cross-compiler for (Currently) Cobol (with Fortran being added later). It is intended to be the first self-hosted open-source Cobol Compiler, e.g. the compiler itself will be written using Cobol.
The Introspector enables the programming tools that deal with source code such as the compiler to communicate in a standard and neutral manner reducing the accidental cost of programming. http://github.com/h4ck3rm1k3/
A script(ing/ed/able) optimizing compiler for the C and Objective-C languages (and in the future other languages such as C++, D and Java). Written in a scripting language to allow for experimentation with code generation and optimization techniques.