Dedicated keyboard sprite. (obviously should support input widget, etc.)
Frames to organize stuff
Scrollable variant that also supports capturing all inputs and setting a "tab" order so you don't have to use a cursor. So you can use up/left and down/right to move between elements and A and B to interface with them.
Cursor variant as well.
Supports grid/pack/place. (can only use one geometry handler in frame - similar to Tkinter)
Better text label widget (wrapping, text handling, images)
GUI/widget extension that combines multiple APIs into a comprehensive widget toolkit: