Boost C++ Libraries 1.67.0
Boost++ is a collection of reusable and well-tested C++ libraries, which cover linear algebra, pseudorandom number generation, multithreading, image processing, regular expressions, and unit testing. They're mostly template based for flexibility, but also encompass independent libraries.
minor feature: New Libraries: Contract, HOF. Updated Libraries: Asio, Atomic, Beast, Container Hash, Context, Core, Coroutine2, DateTime, DLL, Fiber, Filesystem, Fusion, Locale, Log, Math, Multi-index Containers, Multiprecision, Optional, Phoenix, PolyCollection, Python, Spirit, Stacktrace, Test, TypeIndex, TypeTraits, Unordered, Units, Uuid, Utility, Variant.