[bronco21016]

Nothing unique really but I have a handful of older ones laying around that used to be purposed as RaspBMC machines. I recently moved everything to Plex with different client devices so I repurposed one Pi to be a print server for my parent's older printer. Another one has been repurposed as an AirPlay client for my outdoor speaker setup using a cheap amp I bought on Prime day.

I also have a newer Pi 3 running Stratux for receiving ADS-B traffic and weather on my iPad while flying.

Aside from Stratux there are definitely cheaper/easier solutions for what I've set up but nothing beats the 'free' hardware collecting dust in the bin.