ARM-based
Analog Devices: Wireless
AutoChips: MCU
Atmel: SAMxxx
Cypress: CCG2, CCG3PA, EZ-BLE-PSoC-PRoC, EZ-BLE-PSoC6, FM3, PRoC-BLE, PSoC5, PSoC6
Flagchip as Flagship: Raptor P
Geehy: APM32
GigaDevice: GD32
indie Semi: ADAS/Autonomous, UserExperience
Infineon: PSoC4, PSoC6, Traveo-II, XMC
Maxim Integrated: DARWIN
MindMotion: MM32SPIN
Nordic Semiconductor: nRF51, nRF52, nRF53
Nuvoton: NuMicro
NXP: Automotive, iMX, Kinetis, LPC, Sensors, Trimension, Vybrid, Wireless
On-Bright: OB90R
ONSemiconductor: RSL10
Qorvo: Intelligent Motor Controllers
Raspberry Pi: RP2xxx
Redpine Signals: WiSeMCU
Renesas: RA, SmartBond, Synergy
Silergy (Maxim): AM0x, AM1x, MAX716xx, SY7x2xx
Silicon Labs: EFM32, EFR32, SiM3, Wi-fi
STMicroelectronics: Bluetooth, STM32
Texas Instruments: LM3S, LM4, SimpleLink, TM4C12x
Toshiba: TX00, TX03, TX04
WIZnet: W7500x
ZHIXIN: MCU
Kinetis / S32
LPC
i.MX
HC08
HCS08
HC(S)12(X)
S12Z
ColdFire V1
ColdFire V2/V3/V4
RS08
Power MPC5xx/8xx
DSC
CPU3xx
Qorivva MPC5xxx
68HC16
SPC5
STM8
STM32
H8 and H8S/Tiny, MC16C and M16C80, M32C, R8C, RH850, RL78, RX600
TriCore: AUDO TC1xx, AURIX TC2xx / TC3xx
HC05, HC11, MAC7xxx, MCORE