google/tcmalloc

mimalloc is a compact general purpose allocator with excellent performance.

Main gperftools repository

The Boehm-Demers-Weiser conservative C/C++ Garbage Collector (bdwgc, also known as bdw-gc, boehm-gc, libgc)

Abseil Common Libraries (C++)

[ARCHIVED] The C++ parallel algorithms library. See https://github.com/NVIDIA/cccl

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

EASTL stands for Electronic Arts Standard Template Library. It is an extensive and robust implementation that has an emphasis on high performance.

An open-source C++ library developed and used at Facebook.