The need for a standardized method to exchange scientific data between High Performance Computing codes and tools lead to the development of the eXtensible Data Model and Format (XDMF) . Uses for XDMF range from a standard format used by HPC codes to take advantage of widely used visualization programs like ParaView and VisIt, to a mechanism for performing coupled calculations using multiple, previously stand alone codes.

A macro processor that is used automatically by the GNU C compiler to transform programs before actual compilation.

Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC).

LLDB is a next generation, high-performance debugger. It is built as a set of reusable components which highly leverage existing libraries in the larger LLVM Project, such as the Clang expression parser and LLVM disassembler.

This is the GNU C compiler, a fairly portable optimizing compiler for C.

This is the GNU C compiler, a fairly portable optimizing compiler for C.