Cellular Explorer is designed to be a highly flexible editor for the creation of cellular automata. Supported rules include the outer-totalistic binary rules (like Conway's Game of Life), the Wolfram elementary rules, and a variety of others. The rules can be used by themselves or mixed together to create higher complexity automata, and the individual cells are highly customizable. Automata can also have a few meta-rules that influence overall behaviour. Three different rendering modes are available to watch the automata evolve.