Arduino boards and compatible systems are produced by multiple companies, including Analog Devices, Howtronics, Microint USA, Cypress and many others.
Many versions of the official Arduino hardware have been commercially produced to date: Howtronics Analog Devices Microint USA (Cortex-M3 ) PIC16F886-I/SP NXP LPC4330 Cypress Cypress PSoC4 CY8C4245AXI-483 Parallax Parallax Propeller Wilderness Labs Cortex-M4 (STM32F4)
(ARM7) MyFreescaleWebPage Freescale S08DZ60 MyFreescaleWebPage Freescale MCF51AC256 MyFreescaleWebPage Freescale MCF51JM128 Parallax PIC or Parallax SX PICcircuit.com PIC18F2550 or
PIC18F2553 Analog Devices (Cortex M3) 
