Out of the box, they look like this:
If you right click on any button, you will get this menu:
Uncheck the Use Icons item to restore the previous TEXT buttons, like this:
Polar Tracking, Object Snap, and Object Tracking include a context menu to quickly change settings without having to open a dialog.
New to this bunch of tools is the QP, or Quick Properties button. Heidi Hewett has put together a nice article on Quick Properties.