Arduino Portenta Breakout - module with connectors for Portenta H7

Adafruit 493 - LoL Shield BLUE - A charlieplexed LED matrix kit for the Arduino - 1.5

Adafruit 1141 - Adafruit Assembled Data Logging shield for Arduino

I/O pin expander designed for Arduino platforms. Provides 48 connections to increase the number of analog inputs, digital inputs and digital outputs. SparkFun DEV-11723

Powerful expansion shield for Arduino Mega. It is large enough to carry up to 3 Xbee slots, 1 microSD slot and shield headers for most Arduino shields on the market. DFR0165

(DFR0105) Power Shield (Arduino Compatible)

(DFR0144) Relay Shield for Arduino V2.1

Extension board for Arduino Nano and Uno, 14 GPIO lines, connectors with I2C and UART interface lines. The board also has a RESET button and a voltage stabilizer

Multifunctional expander (shield) for NUCLEO and Arduino equipped with Bluetooth 2.0+EDR (HC-05) interface, MEMS 3DoF LIS35, LED-RGB, joystick and analog STLM20 temperature sensor developed and produced by KAMAMI.

Arduino Multifunctional Shield; LED, 7seg, buzzer, switch

(DFR0060)

LED matrix display module (in blue color) with an organization of 14 columns x 9 lines, compatible with Arduino.

Arduino IO Expansion Shield

Adapter enabling easy and quick connection of Modulowo DuoNect to Arduino / Genuino expansion modules. MOD-75

The Bees shield is compatible with Arduino boards such as UNO R3 and Leonardo it has a large prototyping shield giving you plenty of space to experiment and add extra components to your project. Thanks to its uniform interface, there are a huge number of devices compatible with the xBee socket: xBee, WiFi xBee, Bluetooth Bee, zigBee, etc. DFR0210

Expansion board for Arduino, allows easy connection of XBee modules, has separate outputs for I2C, SPI and UART buses. The built-in 3.3V voltage stabilizer and operating mode switch make it easier to program the Arduino when the XBee module is connected to the sockets. DFRobot DFR0265