FLEXICA is a PC based Cellular Automaton (CA) program for running and displaying two dimensional CAs. FLEXICA includes built-inCA rules for John Conway's Life and for HighLife (an interesting variant of Life). FLEXICA can also be used to run 'configuration-dependent CA rules in which the state of a cell at the next generation is affected not only by the number of live neighbour cells, but also by the configuration (=positions) of these cells. Such rules differ from 'configuration-independent' rules like Life and HighLife in which the state of a cell is affected by the number of live neighbours, but not by their configuration.