Top 20 NuGet async Packages

A cross-platform bindings to the libuv library for .NET.
Helper to safely run a Task from a codebase not async.
Unofficial extensions for Starcounter aiding async programming
Push notification extensions for PubNub.Async
Presence extensions for PubNub.Async
An unofficial async/await PubNub API client. This is my attempt to improve upon the client provided by PubNub.
Web API exposing the AsTrEAM asynchronous WCF stream service to help setting up a multi-tier architecture.
Adds an asynchronous stream service to a WCF Service Application
Hydrogen Async Extensions for ASP.NET MVC 5
Darjeel.Web
Darjeel.Memory
Darjeel.Azure
AsyncSections give the user percieved speed from AsyncControllers
Adds async mapping support to automapper with a code only package
TwitterDoodle is fully asynchronous .NET Twitter client which embraces Task Parallel Library from top to bottom
An async streaming XML-RPC server for OWIN
Provides Stream.CopyTo overloads for reporting the current relative or absolute progress while copying.
Extends the FSharp.Control namespace to add Operations, a Railway-Oriented Programming framework compatible with Async Worfklows and the Task Parallel Library (TPL), including a Computation Expression Builder and library functions.
.NET Standard library that provides an extension method for Tasks to forget them once they are fired.