The Cuttle is a bare-bones Arduino-compatible soldering kit. It's based on the concept of shrimping.it, and was first designed as commissioned work for Embecosm, who made it open source hardware.
The microcontroller comes with an Arduino bootloader on it, but you'll need a serial programmer to load Arduino sketches to it. The programming header 'holes' are staggered so that it can be removed after programming. Once assembled, the board fits on a breadboard for easy prototyping.
The Cuttle was project #6 of the Boldport Club.
1x Tactile switch, TE Connectivity, FSM4JRT
1x ATMega328-PU microcontroller, Atmel, ATMEGA328-PU
2x 22pF ceramic capacitor, Multicomp, MC0805N220J500A2.54MM
4x 0.1µF ceramic capacitor, Multicomp, MC0805Y104M500A2.54MM
1x 10KΩ resistor, Multicomp, MCF 0.25W 10K
1x Small signal diode, Multicomp, 1N4148
1x DIP socket, TruConnect, DS1009-28 AT1NS
2x 18 contacts header, Multicomp, MC34737
1x 6 contacts right-angle header, Multicomp, MC34751
1x 16MHz crystal, TXC, 9B-16.000MAAJ-B
1x 10µF electrolytic capacitor, Multicomp, MCMR35V106M4X7