Top 20 NuGet async Packages

A single-threaded async-compatible context.
A Zencoder v2 client.
CorLib is a class-library containing many useful types missing from the .NET Framework, such as Gate, AtomicUInt64, & EventLoopSchedulerSlim, and extension methods expanding on Rx's ToTask for APM integration, as well as WaitHandle conversions to IObsevable<Unit>!
A helper library for using TFS ICancelableAsync with the Task-Based Asynchronous Pattern (TAP) and Visual Studio Async CTP / Visual Studio 11.
ReactiveProperty is MVVM and Asynchronous Extensions for Reactive Extensions. Target is .NET 4.0 Client Profile, Silverlight 4, Silverlight 5, Windows Phone 7.1(with Rx-Main).
C# 5 async/await support for .NET Framework pre-4.5 This package is now unified to include all functionality from AsyncBridge.Net35 and AsyncBridge.Portable.
Core library for the NotificationBar component and notification logic
A helper library for async/await with TPL Dataflow.
The Crawler-Lib Engine is a general purpose workflow enabled task processor. It has evolved from a web crawler over data mining and information retrieval. It is throughput optimized and can perform thousands of tasks per second on standard hardware. Due to its workflow capabilities it allows to stru...
Weakly is a collection of some useful weak-reference types.
A simple async REST client
[4.5, RT8, WP8, WP81] RssReader has a useful RssHelper module allowing you reading every standard RssFeed 2.0 or AtomPub in a simple way. Supports async/await pattern. Supports PRISM RDF Site Summary
Easy-to-use exception causality chains for async/await.
ServiceProxy is a lightweight asynchronous service proxy that allows you to use service contracts in a request/reply manner with your favorite messaging framework.
ServiceProxy.Zmq is a scalable request/reply messaging framework built with ZeroMQ that supports service contracts using ServiceProxy.
An NLog logging extension to process CqlSharp logs through the NLog library. CqlSharp is a high performance, asynchronous Cassandra CQL binary protocol client implementing the ADO.NET data provider interfaces. See https://github.com/reuzel/CqlSharp/wiki for details.
Set of extensions to simplify testing of async methods in Entity Framework and LINQ to Entities.
Package Description
Asynchronous wrapper interface for Sift Science's API
A simple type-safe, generic service locator, now with promises and TPL support.