SmuView is a GUI for sigrok that supports power supplies, electronic loads and all sorts of measurement devices like multimeters, LCR meters and so on.

An electronic load is a type of instrument that applies a voltage and sinks current. These are used by the power supply, battery, solar, or other manufacturers who want to thoroughly test their power sources.

Electronic load based on Arduino

ESP32 Dual Electronic Load 30V 5V CC CV CR with datalogging