https://sites.google.com/view/scratch-web-serial-api/home?authuser=0

https://sites.google.com/view/osep-scratch3/%E7%B7%9A%E4%B8%8A%E8%B3%87%E6%BA%90

OSEP scratch3是S4A社群與均一教育平台
為編程教育而準備的自由軟體