Great news - a the "Control Toolkit" has just been released on the Atlas
site.
The big news is that there is now a control toolkit which includes the following (from
the site):
CascadingDropDown:
Easily link drop downs, complete with asynchronous population and no postbacks!
CollaspiblePanel:
This extender allows panels on your page to collapse and expand with no code.
ConfirmButton:
This extender adds a confirm dialog to any Button, LinkButton, or ImageButton control.
DragPanel:
Makes any panel into an object that you can drag around the page.
HoverMenu:
Allows UI to pop up next to a control when the user hovers over it.
PopupControl:
This extender turns any panel into a popup.
ReorderList:
This control is a full-featured data-bound control that allows its elements to be
reordered on the client via drag and drop.
TextBoxWatermark:
This extender adds "watermark" prompt text to TextBoxes on the page.
ToggleButton:
This extender turns an ASP.NET CheckBox into an image checkbox.