[emptyroads]

nsafs might be another good choice: https://github.com/freedomtools/nsafs

[djsumdog]

I didn't realize there were so many of these jokefs projects.

It's like the software dev equivalent of those silly domain jokes:

https://helenkellersimulator.org/

http://motherfuckingwebsite.com/

http://thingsididlastnight.com/

[empyrical]

Another good one: https://github.com/philipl/pifs

[LambdaComplex]

I wrote a joke filesystem that does nothing but provide 1x1 PNG files[0]

(I was bored and asked for dumb filesystem ideas on IRC)

0. https://github.com/sector-f/colorfs

[metahost]

That's innovative!