Farcaster client Warpcast has launched a new feature called mini apps, which allows users to develop apps for the decentralized social media protocol. Mini apps are similar to the existing Farcaster Frames feature and can be used for various activities such as minting NFTs, building games, and creating polls. The feature is currently supported by Warpcast-specific URLs, but the team may introduce a new Frame button type in the future. The system is also utilizing Neynar, a Farcaster developer platform.