GuyNoIRQ
Dude still seems to be updating this; though, there doesn’t look to be a column detailing port forwarding. Maybe look into a few of these that look good?
https://docs.google.com/spreadsheets/d/1s_o8QioqAILThKD04FYT95jI1siTOX5L/edit?pli=1#gid=1387289544
Tangentially related, SDF is prepping to do a Plan9 bootcamp starting in September. https://sdf.org/plan9/
Some of the smart thermostats almost certainly do. Also this one 100% does. https://hestiapi.com/
We had a fancy coffee machine at an old job that ran Linux. If I remember correctly it was a top of line cafection or zulay machine. One of the ones with a touch screen. Just booted off an SD card as well iirc so probably would have been pretty easy to hack on.
I still find it weird that managed switches run Linux as I generally would think that at those data rates they’d need something closer to the metal but with the magic of HW offloading that’s been a thing in enterprise for a while and OpenWRT even supports some consumer grade ones now.
Some (probably most) ebook readers like the Kindle.
Many newer cars.
TI NSpire calculators.
A slow cooker. https://www.linux.com/news/crock-pot-slow-cooker-wi-fi-smarts-hands/
A cable modem. Specifically the Motorola SB6120 can. Maybe others too.
WiFi enabled SD cards. https://elinux.org/Wifi_SD
A dead badger. http://strangehorizons.com/non-fiction/articles/installing-linux-on-a-dead-badger-users-notes/
EDIT: Totally forgot about these 2 ham radios. You can run and access Linux on both of these. One is by design as its running on a Pi, the other via mod by R1CBU booting the OS from an SD card.
sBitx v2: https://www.hfsignals.com/index.php/sbitx-v2/
Xiegu x6100: https://r1cbu.ru/index.php/home/radio-software/x6100