GWT Tk is a library of reusable components for programming interactive web applications.

• SimpleHyperLink, ExternalHyperLink create links without fussing with browser history
• DropDownPanel a widget which expands to show it's content (like in Gmail)
• ModalDialog a full-featured, highly configurable modal dialog
• AlertDialog a modal dialog tailored for conveniently displaying alerts
• GlassPanel a transparent widget which blocks user interaction with the document
• RowPanel, ColumnPanel panels which facililtate simpler, more natural table-based layouts than VerticalPanel & HorizontalPanel
• Debug print trace statements in all browsers
• EventWrapper, DelegatingWrapper, CWrapper handle additional events on existing widgets
• focus management & containment