L293D is a monolithic integrated, high voltage, high current, 4-channel driver
This is a TFT LCD Adjustable Shield for Arduino Mega2560
This Ethernet Shield connects the UNO R3 board to the internet in mere minutes, connect them with RJ45 cable.
The module carries an onboard WIZnet W5100 Ethernet chip, which provides a network (IP) stack capable of both TCP and UDP, as well as a standard RJ45 Ethernet jack.
The Arduino XBee shield (an Expansion Board without XBee module) is a compliant solution designed to meet low-cost, low-power wireless sensor networks with special needs.
MEGA ProtoShield V3 Prototype Shield Gold PCB processing technology, motherboards, small gold square pad spacing, welding components easier.
Arduino Sensor Shield V4.0 allows you to connect to various modules like sensors, servos, relays, buttons, potentiometers
The sensor shield V2 can connect most senor modules to Arduino control panel.
This is a TFT All Sizes LCD Adjustable Shield for Uno
This shield V03 can achieve a simple two crunodal ZigBee network,achieve wireless communication between Arduino ,and allows the Arduino to wireless communicate over a modified ZigBee protocol using the popular XBee module.