If you want to build, buy and sell NFTs within a gaming context, Ultiverse is a top contender. It uses AI and blockchain for a rich gaming experience with modules for minting NFTs, buying and selling them on a marketplace and staking. Ultiverse also comes with a virtual reality-compatible world built with Unreal Engine 5 for a very immersive gaming experience.
Another interesting project is Struct, an NFT project creation and deployment platform that lets people create and deploy NFT projects without writing any code. It has tools like an Art Generator, Raffle Creator and Mint Page for selling out collections, so it's a good option for people who are new to NFTs.
If you want to incorporate AI into your NFTs, ChainGPT offers a range of tools including an AI NFT generator and smart-contract builder. It's designed for a broad range of users, from mainstream people to businesses and developers, so it should be adaptable to different needs in the blockchain and crypto worlds.