This freeware software allows you to list all the opened windows (applications) on your Windows machine and to kill some of them by specifying their title.

It works even with hidden and system windows (for example trayed applications) and you can specify only PART of the window caption.

You can also export a list of all the opened windows (or only those that matches a specified title) into a text file, so that an external application can know in advance if a specific application is on execution, so it can decide whether to kill it or not (and which is the exact title to specify).

This is possible because @KILL can work also as a command line utility, by passing it some parameters, as described below, so it can be invoked by external applications and batch files.

@KILL closes the windows by sending them a WM_CLOSE message, which should be managed by any any well behaved Windows application. Please note however that an application can prompt the user for confirmation prior to destroying a window, so there's no garantee that an application can be really closed by @KILL. You should test it for a specific application before using it in a production environment.