Xceed Grid for .NET
Xceed
http://www.xceedsoft.com/products/GridNet/

An Eye on Grid Technology
Grid computing and grid services portal featuring articles, papers, news and streaming media content.
http://www.gridsummit.com/toc.htm

World Community Grid
World Community Grid
http://www.worldcommunitygrid.org/

Editable JavaScript TreeGrid
DHTML component written in pure JavaScript to display and edit data in table, grid, tree or grid with tree. Compatible with the most of standard browsers. ASP.NET support code available. [Commercial]
http://www.coqsoft.com/treegrid/

Grid Pro
Automatically generates grids, regular patterns and tessellations as Draw or Vector files. Patterns such as dot lattice, line grid, polar grid, checker board, tessellation and tiled sprite are available.
http://www.keelhaul.demon.co.uk/4mation/gridpr.htm

FlexGrid for .NET
Offering the industry’s most complete suite of dev tools for Windows, Web and Mobile: Studio Enterprise. As well as a distinguished help authoring tool: Doc-To-Help.
http://www.componentone.com/products.aspx?ProductCode=1&ProductID=17

Energy Graphics, Inc.
Energy Graphics, Inc. markets The INTELLEX Exploration System and INTELLEX Report, the industry's most comprehensive data reporting, management and mapping tools, plus the Energy Graphics suite of proprietary oil and gas exploration databases. Energy Graphics, a pioneer in the field of oil and gas data GIS, has been providing the oil and gas exploration industry with high quality data plus computer mapping and data management software and services since 1979.
http://www.energygraphics.com/

SharpGrid
A database-aware ActiveX grid control. It can be used in bound (both OLEDB and ICursor), unbound and virtual data modes. By Data Dynamics. [Commercial]
http://www.datadynamics.com/Products/SG/ProductTOC.aspx

GridsWatch: Grid Computing Portal, Georgetown University
GridsWatch: Grid Computing Portal
http://www.gridswatch.com/

Exontrol ExGrid
Exontrol's new exGrid control an easy-to-implement grid control, provides swift and robust performance and a wide range of formatting features that distinguish it from other grids. The ExGrid is a multi-purpose data visualization system that can display information as a tree, a grid or list, or a combination of both - in either data-bound or unbound mode. This unique synergy between a traditional grid and a traditional treeview allows you to create cutting-edge and visually appealing application interfaces for your end-users.
http://www.exontrol.com/exgrid.jsp