C++ library implementing prioritized or equi-prioritized thread pooling

C++ coroutine await, yield, channels, i/o events (single header + link to boost)

Promise for AngelScript

JavaScript-like Promises for C++20 with ES6 async/await semantics. Supports move (e.g. so you can wrap ASIO and avoid callback hell).

A simple c++ (async / await style) asynchonous programming library

The RStein.AsyncCpp library is a set of types that should be familiar for anyone who knows the Task Parallel Library (TPL) for .NET (C#).

A c++ coroutine library making use of llvm 5.0 coroutine experimental features to dramatically simplify asynchronous logical in C++.

A C++ await/yield emulation library for stackless coroutine

cross-platform coroutine library in c++

Modern concurrency for C++. Tasks, executors, timers and C++20 coroutines to rule them all