A free program for Android, by Hoang Nguyen Van.

With Fonts Keyboard: Cool Symbols, you can create the coolest text styles on your phone. This is useful for all the apps on your phone. With over 70 different fonts and over 50 combined characters, you can create over 3000 different text styles. You can also use cool symbols to create unique nicknames. You can also use the symbols to send a message to the recipient.

Additional features of the app:

Provides appropriate keyboard layout alternatives, such as QWERTY, AZERTY, and QWERTZ, that support accent marks for your native language.

Customizable wallpaper and keyboard color.

Easily change fonts and languages from the keyboard.