Top 20 NuGet 2d Packages

OpenTK 3D/2D engine, very fast for both 3D and 2D applications. Documentation at https://open.timber1900.tk
Converts a level bitmap to a tile sheet / level data and vice-versa.
An easy-to-use Windows Runtime API for immediate mode 2D graphics rendering. For Windows 8.1 and Windows Phone 8.1.
Penumbra allows users to easily add 2D lighting and shadow effects to their games.
Penumbra allows users to easily add 2D lighting and shadow effects to their games.
A 2D deferred-rendered .NET game engine designed for programmers with advanced lighting, shadows, and physics.
LINQ-like operators for manipulating multidimensional arrays.
Window/panel display utility library written with roguelike/2D game development in mind, on top of the C# full color console library RLNET.
C# 100% GameEngine
Provides the ability to use GTK as a window system
Just the encoders from ZXing.Net
Roguelike/2D game utility library.
A collection of extension methods that allow TheSadRogue.Primitives types to easily interface with SFML's equivalents.
Easy-to-use 2D primitives
A canny 2D physics library.
Provides methods and types to render primitives such as lines, rectangles, circles, and more in MonoGame applications.