A flexible charting library for .NET - The Code Project - C# Programming

"ZedGraph is a class library, Windows Forms UserControl, and ASP web-accessible control for creating 2D line, bar, and pie graphs of arbitrary datasets. The classes provide a high degree of flexibility - almost every aspect of the graph can be user-modified. At the same time, usage of the classes is kept simple by providing default values for all of the graph attributes. The classes include code for choosing appropriate scale ranges and step sizes based on the range of data values being plotted.

ZedGraph is maintained as an open-source development project on SourceForge. The site includes a project Wiki, documentation, interim (CVS) updates, and all release versions.

A set of sample graphs is also available on the Wiki, complete with source code (many of the samples include C# and VB code).

As of version 5.0, ZedGraph now requires .NET 2.0. However, you can download version 4.3.5 from the SourceForge project site which works with .NET 1.1."