ZedGraph by: ZedGraph Project

ZedGraph is a class library, user control, and web control for .net, written in C#, for drawing 2D Line, Bar, and Pie Charts. It features full, detailed customization capabilities, but most options have defaults for ease of use.

ZKWeb.System.Drawing by: ZKWeb.System.Drawing

This is a .Net Core compatible System.Drawing implementation modified from mono project, works on windows and linux. Please see project site for more information.