Scherzer 

Common patterns used in programming

OpenGL abstraction classes for OpenGL objects.

An update package that gets the latest version of your software from github/latestRelease

Helper classes for parsing shaders and log files and for include support

Abstract resource (files and embedded resources) handling code.

ImGui for OpenTK.

Spatial data structures, like grids or quad trees for .net.

Persist settings

Library for path finding with A*. Also for grids.