Arduino Mega R3 from Sparkfun

MyoWare 2.0 Arduino Shield - SparkFun DEV-18426 Botland - Robotic Shop

Dialog ULP WiFi DA16200 R3 Shield Hookup Guide - SparkFun Learn

SparkFun Electronics - PRT-11417 Component Kits

SparkFun ESP8266 WiFi shield not present on Arduino Mega 2560 REV3 - Hardware - Arduino Forum

SparkFun SAMD21 Dev Breakout - Melopero Electronics

Arduino Mega - DEV-09152 - SparkFun Electronics

Mega Pro Mini - 3.3V - DEV-10743 - SparkFun Electronics

ATmega328 microcontroller with Optiboot (UNO) Bootloader. Rev3 shield compatible. Program with a USB Micro-B cable using the Arduino IDE platform

SparkFun RedBoard Qwiic ATMega328P compatible with Arduino board w/ Qwiic Connector and CH340C Serial-USB Converter IC Breadboardable R3 footprint

SparkFun ATMEGA32U4 Breakout - Melopero Electronics

Arduino XBee Shield by SparkFun - Robot Gear Australia

DEV-16885: Access all the pins (i.e. ATP) of the MicroMod Processor Boards with the SparkFun MicroMod ATP Carrier Board! This board breaks out the MicroMod Processor Board's pins on the M.2 connector to 0.1 spaced female headers and PTH pads on the edge of the board. This Carrier Board is great if you're interested in testing out different MicroMod Processor Boards for your application. A modern USB-C connector makes programming easy.