Development boards There are 2 products.

Atmel SAM ARM CORTEX architecture development boards and programmers.

Atmel AVR MEGA, AVR XMEGA development kits and programmers.

ESP8266, ESP32, NodeMcu IoT development boards.

RISC-V development boards. Check out Wikipedia RISC-V

STM32 ARM CORTEX architecture development boards and programmers.

Texas Instruments MSP430, MSP432, TIVA Cortex M4 development boards.