1)   9Rays.Net TreeView for ASP.NET 3.6
9Rays TreeView for ASP.NET (FlyTreeView) is a treeview control. ASP.NET treeview control features .net data binding, drag-and-drop, viewstate support, customizable styles and behaviors, load-on-demand, checkboxes, client object model, context menu.

 2)   .NET SlidingMenu 2.0
SlidingMenu creates z-piled stacks of layers in a browser and client dynamically navigate through these layers. Using HTML inline tags it is not only easy supporting a creative focus, it is fun and it opts for a more efficient use of web space.

 3)   SohoCalendar 1.(x)
SohoCalendar has been implemented in order to provide ASP.NET developers with an easy yet visual way to select date and/or time in web forms and applications.

 4)   RImageOrFlashControl 1.1.2.7
ASP.NET RImageOrFlashControl makes it possible to show a picture or a flash on your web-page depending on the file type. If a file extension is swf, then <object> tag corresponding to the flash, or <img> will be rendered on the page.