Android: If you've ever gotten tired of your Android's default font, or you've customised everything else on your device, Type Fresh can help root users install and manage new fonts.
Type Fresh can take any TrueType font and make it your default system font with just a couple short taps. The app can also be used to backup and restore your current fonts which is especially useful if you're changing/updating your ROM often.
The first time you run Type Fresh, you're presented with a list of the fonts installed on your device. Most of the fonts aren't used that often (or at all). The two primary fonts to change are DroidSans and DroidSans-Bold. These should cover most situations.
Type Fresh is a free download for Android, requires root.
Type Fresh [Android Market]