Polkadot is an open-source project founded by the Web3 Foundation. Polkadot is a sharded protocol that enables blockchain networks to operate together. The DOT token serves three distinct purposes: governance over the network, staking, and bonding.
Official website: https://polkadot.network/
White Paper: https://polkadot.network/PolkaDotPaper.pdf
Source code: https://github.com/paritytech/polkadot