GNAT is a compiler for the Ada programming language. It produces optimized code on platforms supported by the GNU Compiler Collection (GCC).

Qbs is a general purpose cross-platform build tool that aims at fast and correct incremental builds. It features a project description language that is similar to QML.

QCoro is a C++ library that provide set of tools to make use of C++20 coroutines in connection with certain asynchronous Qt6 actions.

janus is a general purpose WebRTC server/gateway with a minimal footprint.

Similar to Protocol Buffers, Cap'n Proto is an efficient means of serializing structured data to be transferred across a network or written to disk. Users write a Cap'n Proto definition file that drives a code generator, which in turn emits C++ code for encoding & decoding messages in the Cap'n Proto format.

This is used to develop subsets of the libstdc++ shared libraries for use on custom installation floppies and in embedded systems.