background change

CropaRatio allows easy cropping against a white background on pictures.

App Switch Beep is a background application that plays the system sound.

Run screensavers as desktop background.

Easily edit your PDF file. Change or add text, images and more.

Add, remove, or change file name extension.

Utility to quickly change/restore system icons.

Losslessly change the frame rate of QuickTime movies.

HostsManager can easily change your host.

Allows you to open, examine, and change the contents of a file.

It can change the format of the screenshots (command/Shift/3 or 4).