Nard provides multiple example products to be used "as is" or as a template. Here are but a few:
The basic one. Contains what you need to get started, such as SSH, FTP, WiFi, robust boot + upgrade together with a classic "Hello World".
Display JPEG images and play MP3 audio with fbi and mpg123. May be expanded with a H.264 video player using the the add-on.
Web browser kiosk in full screen mode. Perfect for information panels, bulletin boards, railway guides etc. The startup URL is configured in /settings/www-kiosk. Note: requires the the add-on.
Some interesting builds made by users of Nard:
A network radio player with wakeup alarm and snooze. http://hackaday.io/project/6672-iris-network-radio-with-alarm-clock
Researchers at The University of Iowa mounted Nard devices with GPS and sensors on a tractor and a corn planter. This allowed the laboratory to develop a dynamic model of the planter motion as pulled by the tractor, which in turn help farmers increase the yield.