Top 20 NuGet portable Packages

Some helpers for desktop application development with WinForms.
Provides a powerful yet lightweight Rest client to access remote resources in Crosslight apps.
A small library for performing matrix math, linear algebra - now including sparse matrix solve. Most functions are static and use simple arrays (e.g double[,]) making it easy to use in other projects.
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.
PCL Testing is a simple test framework for writing portable tests and running them on .NET, Windows Phone, Windows Store, Xamarin.iOS, Xamarin.Android, and Silverlight.
Very simple and easy testable (TDD) hierarchical state machine. Only 3 simple steps needed. 1) Define triggers (enum) 2) Create states (IState) 3) Implement configurator (IBascoConfigurator)
Use Rx additions with Property Framework. Consume sequences of property values and reload calls.
Simple & performant model mapping
Client library for accessing the TMDb API in .NET, that is lightweight and simple to use. Supported Platforms: - .NET Framework 4.5 - Windows 8 - Windows Phone 8.1 - Windows Phone Silverlight 8 - Portable Class Libraries
Client library for accessing the SlideShare API in .NET
An easy-to-use and fast caching framework for .NET with support for many storage systems: * Redis * System.Runtime.Caching.MemoryCache * Portable Memory Cache for use with Windows Store, Windows Phone 8, Xamarin apps NOTE: Provision requires a provider to work, please download one of the Provision...
Adds support to the Provision package for using a portable thread-safe collection as cache backend.
Portable Class Library for accessing the ManiaPlanet WebServices and other Information. Check Project Page for how to use.
The best mini model around
ViewModels for interacting with the various Weave News Reader services
Light-weight, portable logging interface. Combine with PortableLog adapters for logging frameworks or write your own.
Provides Linq extensions for 2D .NET arrays.
Xamling IOT for development the Xamling way
Xamling IOT for development the Xamling way
Portable HAL client for .NET. There's a CSharp version for CS.