Avalanche is a smart contract blockchain platform. Developers can deploy decentralized applications such as decentralized finance, gaming, NFTs, and much more.
Ethereum is a Proof-of-Stake blockchain that powers decentralized applications (dApps) through smart contracts, without being controlled by a centralized entity.
Litecoin is a peer-to-peer cryptocurrency created by Charlie Lee. It was created based on the Bitcoin protocol but differs in terms of the hashing algorithm used and max supply.