The XBee Shield simplifies the task of interfacing an XBee with your Arduino. This board mates directly with an Arduino Pro or USB board, and equips it with wireless communication capabilities using the popular XBee module. This unit works with all XBee modules including the Series 1 and Series 2 (and 2.5), standard and Pro version.
This is our affordable PWM motor controller. It has three inputs: INA, INB, and PWM. It uses the VNH3SP30 driver. And it have a 5V 1A Output voltage regulator.
The InvenSense MPU-6050 sensor contains an accelerometer and a gyroscope in a single chip. It is very accurate, this sensor is used in self balancing robots, drones, smartphones, etc. The sensor uses the I2C-bus to interface with microcontroller.