Sutff from the Firmware Linkedin group discussions and other sources:
Automotive
Fujitsu (Spansion)
Power architecture
Avionics
Communications
Computer Vision (deep learning)
Instrumentation
Power Control
Critical
Handheld/Consumer electronics
Industrial electronics
ARM
AVR
Freescale HCS08
Kinetis
MSP430?
STM32F3/F4
Led panels
Linux apps
Low power
Medical
RT/Robotics
Freescale eTPU
C2000
8-bit AVR
MSP430
nRF51822 (BLE)
STM32F (Cortex M3)
Sensors
C5000 for low power signal processing
Bosch BHA250 and BMF055 for sensor fusion applications
Atmel SAMW25-XPRO (sensor bridge)
Kinetis KL28Z
TI CC2650 with an autonomous sensor controller and wireless connectivity
Space
Thermostats/Low Power