From PreForm Assistive Technologies:
UI Browser is the ultimate assistant for Apple's AppleScript GUI Scripting and Accessibility technologies, helping you to explore, manipulate, and monitor the user interface of most Mac OS X applications running on your computer. With the push of a button, it also generates AppleScript statements to control any application using GUI Scripting, even applications that are not otherwise scriptable.
What's new in this version:
Support for new accessibility features introduced by Apple in OS X 10.10 Yosemite as well as fixing an occasional crash.