Lumisoft UI Controls
With Lumisoft’s UI Controls 0.11, developers can choose from over a dozen basic flat controls for Windows Forms apps. The library seems occasionally somewhat buggy. With one control, the code generated when it is dragged onto a Form will not compile. The controls can be configured using the Property tab in VS.NET, but lack advanced WYSIWYG design-time support databinding capabilities. The code is written in C#.