Santa always shows up with Krampus. In reality, Krampus is Satan. He just hired some old dude that plays his misspelled alterego. But all the letters actually always go to Satan.
Snapchat and Google Docs are the only two non-FOSS apps I can't shake off.
It would be cool to have a Snapchat clone based on Briar.
Google docs because I don't trust myself with my own data, I always end up delteting important documents cause I save them to random locations when cleaning house. Having it all in once place, with autosync, search and a nice powerful mobile interface is really convenient.
Also: "NixOS's declarative configuration allows you to define your entire system configuration, including software packages, services, and system settings, in a single configuration file."
BlackberryPi Flipper Zero with LoRa and a thermal camera (because why not) would be cool