The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Java, and Ada, as well as libraries for these languages (libstdc++, libgcj,...).
This page contains several computer programs, written in C/C++ language (and some Matlab scripts), that implement encoding and decoding routines of popular error correcting codes (ECC), such as Reed-Solomon codes, BCH codes, the binary Golay code, a binary Goppa code, a Viterbi decoder and more.
NetCDF (network Common Data Form) is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.
ANTLR, ANother Tool for Language Recognition, formerly known as PCCTS, is a language tool that provides a framework for constructing recognizers, compilers, and translators from grammatical descriptions containing actions in a variety of target languages. ANTLR automates the construction of language recognizers. From a formal grammar, ANTLR generates a program that determines whether sentences conform to that language. In other words, it's a program that writes other programs. By adding code snippets to the grammar, the recognizer becomes a translator or interpreter. ANTLR provides excellent support for intermediate-form tree construction, tree walking, translation and provides sophisticated automatic error recovery and reporting.