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.

LLVM is a collection of libraries and tools that make it easy to build compilers, optimizers, just-in-time code generators, and many other compiler-related programs.

Pyro (PYthon Remote Object) is an easy to use and powerful distributed object system for Python. In a distributed object system, clients send requests to distant servers, which owns the remote objects. Pyro simplifies a lot the creation of clients and servers, and has among its features: - dynamic and static proxies for all remote method invocations, - a naming service which keeps record of the location of objects, - mobile objects support: clients and servers can pass objects around, - exceptions that occur in the remote object is raised on the client too, - multithreaded server support to handle multiple requests simultaneously.

The ament build system is the most common way to build packages for ROS 2. ament_cmake provides the necessary tooling to build ament packages with CMake.

Psycopg 3 is a newly designed PostgreSQL database adapter for the Python programming language.