Obviously Etherium, but what are the others, and what are their advantages? I remember reading about one that has a much lower gas price, but as the cotton-headed-ninnymuggins that I am I can't remember which or track down the article.
Ethereum blockchain
NFTs are now being used to commodify digital assets in art, music, sports, and other popular entertainment, with most NFTs part of the Ethereum blockchain, while other blockchains can implement their own versions of NFTs. A number of high-profile sales were made just in the first few months of the year.