listening-pattern.sol: A pattern for notifying smart contracts of some action in another smart contract.
owned.sol: A standard pattern for access control of a smart contract, with one owner.
storage-contract-proxy-template.sol: A standard proxy pattern for storing storage in another smart contract.
universal-smart-contract.sol: A smart contract that can be used as the entry-point of any other smart contract. Allows for updateable smart contracts while leaving the same entry-point active.
courier-service.sol: An implementation of a signing to confirm delivery from a courier service.
useful-functions.sol: Various useful functions -- currently (i) a function to check whether this a smart contract at a certain address.