I keep meaning to go back and create an automated ruleset explorer that looks for stable but non-oscillating and non-constant population counts. Maybe someday...
Certain rules do, though the exact analog rule of Conway's Game of Life is a bit boring as i recall. In general it was a lot easier to find interesting behavior in Brian's Brain rulesets.
The code is here: https://github.com/heyitsguay/gol3d
I keep meaning to go back and create an automated ruleset explorer that looks for stable but non-oscillating and non-constant population counts. Maybe someday...