Arduino TinkerKit Development Kits
Base, Starter, Pro, Scuola, & Android Kits simplify electronic prototyping w/o use of breadboard or soldering iron.

Arduino A000064/65 Wireless Proto Shields
Enable wireless communication for Arduino boards to XBee® or similar RF modules, available w/ on-board SD slot.

Arduino Mega Android™ Development Kit
MCU board based on ATmega2560, with a USB host interface to connect with Android-based phones.

Arduino AVR Mini and Mini Lite Microcontroller Boards
Small microcontroller boards based on ATmega328, for use on breadboards & when space is scarce.

Arduino AVR Nano Microcontroller Board
Small, complete, breadboard-friendly, microcontroller board based on ATmega328.

Arduino Fio Microcontroller Board
MCU board based on ATmega328P and intended for wireless applications.

Arduino Mega2560 Microcontroller Board
Easy to use development board based on ATmega2560 MCU.

Arduino Uno Microcontroller Board
Development board based on Atmel ATmega328 MCU.