Cluster HAT Kit (includes 4 x Raspberry Pi Zero W)

Canadian source for Raspberry Pi, Arduino, Micro:bit, DIY electronics, robotics, and educational products. Raspberry Pi approved distributor for schools, commercial and personal projects. Microbit accessories and educational kits. Huge collection of Adafruit and SparkFun products in stock.

American Raspberry Pi Shop. One stop shop for all your Pi needs. Raspberry Pi add-ons, HATs, accessories, Starter Kit, Media Center kit, RetroPi

Cluster HAT v2.5

Raspberry Pi CM4 Cluster Mini-ITX board 6 RPI CM4 supported

Cluster HAT v2.5 for Raspberry Pi

A tiny cluster based on 4x Raspberry Pi Zero 2 W : r/homelab

ClusterHAT review: Raspberry Pi cluster computer kit — The MagPi magazine

CloverPI Clusters Up to 4 Raspberry Pi Boards (Crowdfunding) - CNX Software

ClusterHAT Review for the Raspberry Pi Zero

Turing Pi 2 mini-ITX cluster board supports RK3588 based Turing RK1, Raspberry Pi CM4, and NVIDIA Jetson SoMs (Crowdfunding) - CNX Software

C4Labs Cloudlet Case Cluster Case for Raspberry Pi and Other Single Board Computers-Clear