UniTask
Provides efficient allocation free async/await integration for Unity
...Runs completely on Unity's PlayerLoop so doesn't use threads and runs on WebGL, wasm, etc. Asynchronous LINQ, with Channel and AsyncReactiveProperty. TaskTracker window to prevent memory leaks. Highly compatible behavior with Task/ValueTask/IValueTaskSource. In UniTask v2, almost everything is zero-allocated due to a thorough rewrite of the code (Technical details to follow). In addition to significant performance improvements, the new asynchronous sequences, and Asynchronous LINQ.