From Wikipedia:

The LLVM compiler infrastructure project is a "collection of modular and reusable compiler and toolchain technologies" used to develop compiler front ends and back ends.

• Clang — C language family frontend for LLVM.

https://clang.llvm.org/ || clang

• lld — High-performance linker from the LLVM project.

https://lld.llvm.org/ || lld

• LLDB — High-performance debugger for C, Objective-C and C++.

https://lldb.llvm.org/ || lldb

• llvm — Compiler infrastructure and extra tools.

https://lld.llvm.org/ || llvm

• libc++ — LLVM C++ standard library, including full support for C++11 and C++14.

https://libcxx.llvm.org/ || libc++

• libclc — Library requirements of the OpenCL C programming language.

https://libclc.llvm.org/ || libclc

• Polly — High-level loop and data-locality optimizer and optimization infrastructure for LLVM.

https://polly.llvm.org/ || polly

• https://llvm.org/