Curvay is one of a pair of pattern producing programs by Spelunk Computing (the other being Shapari, also featured here). Curvay produces patterns based on the interaction of two wave shapes. The patterns produced can then be filled in with colour as shown below. There are many wave types supplied and you may design your own too. There are no menus, the interaction being provided by the innovative interface. The results may be stored in the program itself or exported to other manipulating programs via the clipboard.