Duino-Coin
A coin that can be mined with almost everything
... was founded in 2019 and is a for-fun, fully original crypto coin project developed by a team of young developers that focuses on energy-efficient mining. It's mostly, but not only, dedicated to people who are just starting out in the crypto world as it doesn't require any expensive equipment. To make mining with underpowered devices possible Duino uses the so-called Kolka system that consists of a few stages that test the device performance, assign a difficulty tier and distribute the rewards.