Chocolatey

like yum or apt-get, but for Windows.

Squirrel

Squirrel is both a set of tools and a library, to completely manage both installation and updating your desktop Windows application.

Wix Toolset

The most powerful set of tools available to create your Windows installation experience

Unicolour

Colour conversion, interpolation, and comparison for .NET.

ColorHelper

Useful methods for work with colors.

Imgix-CSharp

Easily update image urls to be fast and responsive. [$]

Colourful

Open source .NET library for working with color spaces.

TeximpNet

A cross-platform .NET Standard library for reading/manipulating/writing image files. The primary focus is to create 2D/3D/Cubemap textures for graphics/game applications, notably to convert images to GPU compressed formats and generate mipmaps. The library wraps the FreeImage native library to import/export over 30 common image formats, and wraps the Nvidia Texture Tools native library for GPU compression features. It also has a fully featured DDS format importer/exporter written in C#.

PixelViewer

Cross-platform (Windows/macOS/Linux) image viewer which supports reading raw Luminance/YUV/RGB/ARGB/Bayer pixels data from file and rendering it. 10/16-bit YUV and viewing image frame sequence are also supported (v1.99+).

OpenCvSharp

Cross platform wrapper of OpenCV for .NET Framework.