Top 20 NuGet unity Packages

A set of convention based classes to speed up the setup of projects using EcsRx
Reactive data objects for extending the dotnet reactive library, unirx provides this out of the box
Ninject dependency wrapper for use with infrastructure projects
Unity adapter for NLog
Unity adapter for Microsoft.Extensions.Logging
Auto-mocking container
An Unity-based type resolver for Postie
A set of convention based systems to speed up the setup of projects using EcsRx
Fork of the ClojureCLR compiler and runtime used in the Arcadia project
The package defines a custom Unity's InjectionMember - InjectionConstructorLookup. It resolves a provided type between several inheritors of some basis type, depending on their constructor parameter signatures.
UnityContainer implementation of the Shuttle.Core.Container dependency injection interfaces
A library for generative interactive dialog
Task Parallel Library for Unity (.NET 3.5)
Dependency Injection in ASP.NET WebForms using Unity.
NitroNet Unity package
Real-time face detection and tracking, as well as general methods for detecting, tracking and transforming objects in image streams. Contains Haar cascade definitions, Camshift and Dynamic Template Matching trackers. This package is part of the Accord.NET Framework.
AutoMoq built for Unity5
QRCoder.Unity.Light is an extension to the popular QRCoder library. It allows you to create Texture2D-based QR codes for usage in Unity projects.The "Light" version doesn't come with UnityEngine dependency and allows you to use your own UnityEngine.dll. It's licensed under the MIT-license.
Unity.Mvc4 is a library that allows simple Integration of Microsoft's Unity IoC container with ASP.NET MVC 4. A copy of Unity.MVC3 except it references MVC4