This is version 3 of Jeremysr’s Conway’s Game of Life implementation for DS, which is recoded completely and has way more features.

Features:

256×192 array of life (same dimensions as the resolution of the DS screen.)
Zoom in 1x, 2x, 4x, 8x, 16x, and 32x.
At zoom levels >=4, a grid is displayed.
Draw life while the simulation is running.
Change the rules to whatever you want.

http://forum.gbadev.org/viewtopic.php?t=15642