Nico Becker
This is a very neat looking implementation of John Conway's Game if Life, it runs really well and gives you A TON of customisation options, like literally changing rules, and making new ones. You can also place blueprints, which are also pre-made. I have wanted to make my own implementation, but after seeing this, litterly gave up because I knew I couldn't recreate this level of polish. Very well made
Skitch Winters
There doesn't seem to be a way to save or reset a configuration. Makes experimenting almost impossible. Also, you can change the simulation speed but there's no indicator of the current speed.
Robert Simpson
Very nice, zooms smoothly, can control speed easily, and has a bunch of good templates. The function to place a random bunch of dots isn't easy to find though - you use the Start Selection first.