Circle's L1 blockchain, Arc, has announced the launch of 11 projects on its public testnet. These projects include ZKP2P, a protocol for stablecoin activities; Sequence, a crypto trading platform; and Superface, a smart agent solutions platform. Other projects are Blockradar, Copperx, Crossmint, Hurupay, Para, CFi, Hinkal, and Axelar Network, each offering various blockchain and crypto-related services.