https://github.com/meichthys/foss_photo_libraries
We have a Tushy (Spa 3.0) that takes 2 water connections: a cold water and a hot water (comes from the tap line). That might work if you have hot water connection.
Tried wefwef as well. So far I like it over Mlem.
Reddit Is Already on the Rebound
Interesting article from Wired, with some decent sources.