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Game of Death is a toy Game of Life implementation in Typed Racket. I call this a toy implementation because it's built on a naive quadtree data structure rather than the state-of-the-art Hashlife. However, building it taught me a bit about Typed Racket, and it was a blast to put together.
It has some basic support for Run Length Encoding, and will import and export via that format.
GIFs can be exported, but beware, it's slow and might crash your system. GIFs will be sized according to the viewport, so if you're full screen, you're probably going to have a bad time.
The rule governing birth and death of cells can be modified to your liking. Colors are customizable. Importing and exporting to file is available. There are several sizes of brush.
See the in-game help dialog for more. (Or just look at the code.)
These can be compiled and run with the Racket programming language.
1.0.0. First release!
So far, just me (rob@robertlavery.com). Pull requests are welcome.
I should clean up and better comment this code. If there's interest I might compile, sign and host binaries, for those who don't want to install Racket. (I really do recommend Racket, though.)