Arduino Prototype Shield V.5  has a nice standard 0.1″x0.1″ prototying grid with big pads that comes with  stacking headers and plain header. It is  Compatible with tiny breadboards and there is a reset button and a general use button included in it. You can ues it with  UNO, NG, Diecimila and Duemilanove Arduinos. The power arduino prototype rails down the middle and sides.

Arduino Mega Prototype Shield comes with all hardware included and  can be directly pulg into Arduino MEGA. It this we can use ‘mini’ or medium bearboard . There are lost of GND and +5V rails with a reset button up top. .There  are  Extra 6mm button and DIP prototyping area makes it easy to add more chips.It is compatible with Arduino Mega pinout. It has PCB design.

The Arduino   Gps shield is based on EB-365 GPS module that comes with Micro SD interface. It has got a UART interface and a active antenna design with high receive sensitivity. It has got a extremely fast time to first fix at low signal level. It is compatible with Arduino Uno boards. It is easy to setup.

The Arduino Ethernet Shield R3 allows an Arduino board to connect to the internet. This shield also has a Micro SD card socket, with active voltage translators  and reset switch. To use this shield we should mount it on top of Ardunio bords.It supports up to eight simultaneous socket connections. It can be Power Over Ethernet ready Magnetic Jack. The Arduino Ethernet Shield R3 provides a standard RJ45 ethernet jack.

The Arduino Pro Mini is a microcontroller board based on the ATmega328 that does not come with connectors populated so that you can solder in any connector or wire with any orientation you need. It has Max 150mA output and 5V regulator. It supports  auto rest and has On board Power and Status LEDs. Its weight is less than 2g. To provide USB power and communication to the board a six pin header can be connected.It has the features of over current protection and reverse polarity protection.

Arduino Pro Micro Usb is an ATmega32U4 board  running at 5V/16MHz. It is the smallest Arduino –Compatible board. It has high speed PWM with programmable and resolution from 2-11bits.it is Supported under Arduino IDE v1.0.1. it can accept voltage up to 12VDC. It has USB connectivity on-board and on board power and status LEDs.

 Arduino nano  is a smallest, complete, and breadboard friendly board that includes a serial monitor . It can be powered via Mini-B USB connection. The Arduino Nano can be programmed with the Arduino software which we can download via official website. It also contains automatic reset .It also contain manual reset switch. The power source is automatically selected to the highest voltage source in arduino nano.

The Arduino Ethernet Module is a compact Ethernet Module with the ENC28J60 Ethernet controller chip, LAN connector and SPI interface for the microcontroller, arduino, avr, pic and so on. This Arduino Ethernet Module helps us to connect our projects to the network and the internet and run a web server or web client.

The Arduino Ethernet Shield Clone is an Ethernet Controller Board with W5500 Ethernet Controller which allows us to connect to internet through ICSP (In-Circuit Serial Programming). This Ethernet Shield Clone Module communicates with Arduino Mega Board through SPI connection with ICSP pins. Its operating power supply is 5V which is supplied from Arduino Mega 2560. It also has an Onboard SD Card slot which helps in Read/Write operation.

The Lilypad   Arduino is based on ATmega 168V or ATmega328V Microcontroller designed for wearables and e-textiles. It can be sewn to sensors and actuators with conductive thread, fabric and similarly mounted power supplies.

The LilyPad Arduino USB board is  based on the microcontroller ATmega32u4. It can be simply connect it to a computer with a USB cable or power it with a battery to get started. It has wearable e-textile technology with USB support.  This board also has JST socket to directly connect to a Li-Po battery with feature of battery rechargeable through the board. It is also supported by Arduino IDE 1.0.2 and up.

The  USB Host Shield  based on the MAX3421E allows you to connect  a Arduino board to a  USB device . It is   is a USB peripheral/host controller containing the digital logic and analog circuitry.  It works with standard dual 5/3.3V board  and 3.3V-only for  Arduino Pro boards. It has inbuilt reset button and supports HID devices such as keyboard , mouse also Mass storage devices such as USB sticks and many more. It also support android mobile phone . USB HOST mode and USB HUB protocol.