MicroAxe
A tiny picaxe board designed to be stacked.
This is a tiny picaxe based board that is designed to be stacked. It uses a picaxe08m2 and has 5 pins to suit all of you tiny project needs. There is the bottom tier which has the microcontroller and the necessary resistors/components then on the upper tiers you can have anything from temperature sensors to headphone jacks for connecting to computers. It is a truly versatile board.