A compact general purpose allocator with excellent performance. [MIT]

General purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. [BSD] website

Google's fast, multi-threaded malloc implementation. [Apache-2.0] website

Cross platform lock free thread caching 16-byte aligned memory allocator implemented in C. [PublicDomain]

Custom memory allocators to improve the performance of dynamic memory allocation. [MIT]

Smart pointers for the (GNU) C programming language. [MIT]

Message passing based high-performance allocator. [MIT]

STL compatible C++ memory allocator library. [ZLib]

Fast, Scalable, and Memory-efficient Malloc for Linux, Windows, and Mac. [Apache-2.0] website

A tiny garbage collector for C written in ~500 LOC. [BSD]

A single header buddy memory allocator for C with bounded allocation costs. [0BSD]