In terms of the form factor, it looks a lot like the nRF24L01 2.4G RF transceiver. This is a serial module with a built-in TCP/IP stack, so you can use it standalone but you will be likely limited. You need a FTDI to connect this module to your computer, and start communicating with it. FTDI is a common name for USB-to-TTL (or serial) converter.
HC-05 module is an easy to use Bluetooth SPP (Serial Port Protocol) module, designed for transparent wireless serial connection setup.Serial port Bluetooth module is fully qualified Bluetooth V2.0+EDR (Enhanced Data Rate) 3Mbps Modulation with complete 2.4GHz radio transceiver and baseband.
RF modules are very popular among the Arduino tinkerers. The 433MHz is used on a wide variety of applications that require wireless control. Specifications RF 433MHz ReceiverFrequency Range: 433.92 MHzModulation: ASKInput Voltage: 5VNote: Each unit contains a pair of transmitter and receiver.
This is essentially a ramped up version of our Ardumoto motor driver shield. For this monster shield we've replaced the L298 H-bridge with a pair of VNH2SP30 full-bridge motor drivers. We've also beefed up the support circuitry so this board is capable of driving a pair of high-current motors!
This capacitive touch sensor module uses the TTP229 integrated circuit, making it easy to add capacitive touch input for projects. It features 16 sensitive touch pads that make an ideal replacement for the traditional keypads.
This GSM Modem can accept any GSM network operator SIM card and act just like a mobile phone with its own unique phone number. Advantage of using this modem will be that you can use its RS232 port to communicate and develop embedded applications. Applications like SMS Control, data transfer, remote control and logging can be developed easily.