A free program for Android, by Nico Schröder.
LED Banner Pro: Marquee Maker is an easy-to-use, free app for making banner-like scrolling text displays on your device.
This is a great app to use when you are in a noisy place and you find it hard to speak out loud. An example of this is when ordering at a bar.
You can add text, change the font, change the size, color, and many other options to make your display unique.
There is an option to use the LED lights as an animation.
You can choose to be notified after successful playback with vibration, sound, or a short flash.
You can also save your animations as GIFs or MP4 and send them to your friends.
