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• yo-cordapp: A simple CorDapp that allows you to send Yo’s! to other Corda nodes
• cordapp-example: Models IOUs (I Owe yoUs) between Corda nodes (also in Java)
• obligation-cordapp: A more complex version of the IOU CorDapp (also in Java) Handles the transfer and settlement of obligations Retains participant anonymity using confidential identities (i.e. anonymous public keys)
• negotiation-cordapp: Shows how multi-party negotiation is handled on the Corda ledger, in the absence of an API for user interaction
• ping-pong: Demonstrates the messaging functionality within the flow framework.

• observable-states: Use the observers feature to allow regulators to track regulated activity

• blacklist: Use an attachment to blacklist specific nodes from signing agreements

• whistleblower: Use confidential identities (i.e. anonymous public keys) to whistle-blow on other nodes anonymously

• oracle-example: Use an oracle to attest to the prime-ness of integers in transaction

• heartbeat: Use scheduled states to cause your node to emit a heartbeat every second

• queryable-states: Persisting ContractState information to custom database table using QueryableState.

• flow-http: Make an HTTP request in a flow to retrieve the Bitcoin readme from a webserver
• flow-db: Access the node’s database in flows to store and read cryptocurrency values

• explicit-cordapp-upgrades: A client for upgrading contracts using the Contract Upgrade Flow
• implicit-cordapp-upgrades: An app with a number of different versions, showing how to carry out various upgrade procedures

• pigtail: A node web-server using Braid and Node.js
• spring-webserver: A node web-server using Spring that provides generic REST endpoints for interacting with a node via RPC and can be extended to work with specific CorDapps

• corda-nodeinfo: A command-line client for retrieving information from a running node Useful for checking that a node is running and is accessible from another host via RPC

• reference-states: A cordapp demonstrating the use of Reference States to extend the IOUcordapp-example cordapp