TeeChart.NET - Produces Windows forms, ASP.NET webforms and compact framework. Written in C#. By Steema Software. - http://www.steema.com/products/teechart/net/whatsnew.html
SharpPlot - A fully managed .net charting software library for ASP.NET, Winforms and Mono applications. - http://www.sharpplot.com
Nevron Chart for .NET - Charting and diagramming components for both WinForm and WebForm applications. Uses OpenGL and GDI+ remdering engine. Features gradiants, textures, legend, 3D view control, and shadows. - http://www.nevron.com/Charting.aspx?nav=ChartingNav&content=Charting
Chart component .Net - Draw 2D pie and bar charts and export to the browser in GIF, JPEG, or other formats. - http://www.chartcomponent.com
ERM Diagram .NET - Use ERM to display and edit flowcharts, workflows, organisation charts or networking diagrams in applications or web. By Crainiate Software. - http://www.crainiate.net/products/erm/
VARCHART XGantt .NET Edition - A .NET Windows Forms control which serves to display interactive Gantt diagrams with flexible data-driven tables, bars and histograms. - http://www.netronic.de/english/index_prod.html?set_x_gantt.html
ProWorks Chart for .NET - Delivers charting functionality to .NET forms applications. I support graph skins and provide financial and statistical formulas. - http://www.proworks.com/products.php?pid=5
componentXtra .NET Graph Component - Showing data in a cartesian graph (X,Y). Free version available. Includes sample code (VB and C#). - http://www.componentxtra.com
eNetricity OrgChart - A .Net component for rendering hierarchical organization charts. - http://ochart.enetricity.co.uk/
Scarlet Chart Component - A .NET control to display bar, pie and line charts. Fully customizable to fit into any application. - http://www.scarlettech.com/sschart.htm
Chart FX for .NET - Chart rendering component. Features borders, gradients, alpha blending, anti-aliasing and transparency. By Software FX, Inc. - http://eu.softwarefx.com/SFXNETPRODUCTS/CFXFORNET/
.netCHARTING - A charting solution for use with ASP.NET. Features include intelligent date grouping, data aggregation and automated charts from your own database. - http://www.dotnetcharting.com/