YKill gives you information about all top-level windows that are running in the background.

With YKill, you can close and kill windows instantly and if you´re not sure which window is the problem, you can scan all tracked windows in search for the stuck ("Frozen") window. YKill can also help you in case of emergency: With YKill, you can run applications and shutdown your system directly from the menu. You can also choose which windows will be tracked, using a predefined a style or your own custom style.

YKill also features a complete help system that can be used whenever you´re not sure what to do.