SAM D20 Arm® Cortex®-M0+ Microcontroller - Microchip Technology | Mouser
ARM Cortex-M - Wikipedia
Kanda - Atmel ARM SAMD and SAML handheld programmer for Atmel SAM D microcontrollers with USB loader
Teensy LC - Usb Arm Cortex-M0+ – Arduino compatible - Electronilab
Arduin0 Mkr Zero Abx00012 Development Board The Board Is Powered By Atmel's Samd21 Mcu With 32-bit Arm Cortex M0 + Kernel. - Buy Supply Electronic Development Board,Atom Development Board,Industrial Grade Development Boards
Samd21 M0-mini. 32-bit Arm Cortex M0 Core. Pins Soldered. Compatible With Arduino Zero, Arduino M0. Form Mini. - Integrated Circuits - AliExpress
FreeRTOS project for Atmel SAMD20 ARM Cortex-M0+ microcontrollers