Antonio Bello posted on July 26, 2007 02:44
Xceed DataGrid for WPF is a powerful and flexible grid control, with several features such as rich in-place editing, dafa grouping, input validation.
The most interesting thing is that this data grid is offered for free. Accordingly to what is stated in the licensing FAQ, registration is free (but in the future it might no longer be licensed for free to new users), it won't expire, and it also includes any future upgrade. There is no limitation to its usage for building commercial products (in other words, no run time royalties), except for some limitations when used to build development tools.

A live demo is available here.
Even if you don't plan to have an immediate use of this control. I suggest you to register and obtain the free license key - you might need it in the future.
About Xceed
Xceed provides several controls and control libraries for .NET, WPF and VB6, ranging from visual components (grids, docking windows, editors and so on) to compression, networking and encryption components. Unfortunately the DataGrid for WPF is the only component available for free, but maybe we can't pretend them to offer all of their products at no cost.