Here we should post life loops. Like 3 particle GoL line.
Here is the ones I know of.
3 particle GoL line.
3 particle STAN line.
Seed like this when space = 0 and seeds = 1
01
10
And 34 like this when space = 0 and 34 = 1
10
11
01
GNAR in a 3x4 diamond cover. Put one pixel of it.
Please say any you know not posted.
The smallest cold ones i know are:
Pixel of MYST
Flood Fill of STAN
Adjacent 2x2.

2 2x2 is good.

I like bombers