Adafruit Trinket M0 Microcontroller Board Atmel ATSAMD21E18 Low Cost & Small Enough to Fit Any Project Programmable for Use with CircuitPython Arduino IDE 256KB Flash 32 KB RAM 3500

Same size, form-factor, and pinout as classic Trinket Updating ATtiny85 8-bit AVR for ATSAMD21E18 32-bit Cortex M0+ 256KB Flash - 32x as much as 8 KB on ATtiny85 32 KB RAM - 64x as much as 512 bytes on ATtiny85 48 MHz 32 bit processor - 6x as fast as ATtiny85 (not even taking into account 32-bit speedups)