This page lists information about Central Processing Units (CPUs), Microprocessors and Microcontrollers used to control a robot:

• Raspberry Pi
  • Raspberry Pi Pico
• Arduino
  • Arduino Micro
  • Arduino Nano
• Circuit Playground Express
• ItsyBitsy M4 Express (Adafruit)
• Espruino WiFi, a Javascript-based microcontroller with WiFi running a STM32F411CEU6  32-bit 100MHz ARM Cortex M4 CPU, 512kb flash, 128kb RAM
• Micro:bit
• Orange Pi 4
• NanoPi Fire3
• ESP32
• Odroid C4 (product page, wiki page): a quad-core 2.0GHz Cortex-A55 (Amlogic S905X3) cluster with 4GB RAM, a Mali-G31 GPU
• Odroid XU4: The XU4 looks good but unfortunately uses 1.8v GPIO so requires a separate XU4 Level Shifter Shield
• Others?