OPEN SOURCE: Source code is available at http://code.innodroid.com/dpichanger
This application allows you to view and change the DPI (pixel density of your LCD or LED display) of your phone. Changing the LCD density will allow you to scale up or down the appearance of everything on your display.
The file /system/build.prop is backed up and modified to change the ro.sf.lcd_density value to the value you specify.
If you dont understand what this is, don't download it.