Node-RED - a low-code tool for visual programming. Compatible with, for example, Raspberry Pi.

Node-RED is a visual programming tool developed by IBM, which allows users to create data flow applications using a graphical interface. With Node-RED, users can easily connect various devices, services, and APIs just by dragging and dropping elements onto the screen. This customizable interface empowers developers to build personalized solutions that meet specific needs. It is particularly popular in Internet of Things (IoT) projects because it allows integration with various communication protocols. Additionally, Node-RED is open-source software, meaning anyone can use, modify, and develop it according to their requirements. Importantly, the community around Node-RED is very active, which results in a wealth of available resources and support for newcomers.