Codejock Xtreme PropertyGrid from Codejock Software; and a Visual Studio .NET style verb panel. (Serial Number Required)
SPG will fit nicely in a RTL application.
Finally, a truly flexible and customizable PropertyGrid for serious .Net developers.
Smart PropertyGrid.Net for WinForms extension
Extension for Visual Studio – SPG.Net is undoubtedly the best 100% managed PropertyGrid for .Net 1.1, 2.0, 3.X and 4.X.
Smart PropertyGrid for .NET – Free download and software