Hello World
The smallest useful Pebble contract: a script that locks a UTxO until the owner signs a transaction that includes a fixed greeting in the redeemer. It exercises the contract/state machinery, signature-checking, and a redeemer payload — everything the larger examples build on.
Simple minting policy
A native token's supply is controlled by its minting policy — a Plutus script invoked under the Mint purpose whenever tokens with that policy's hash are minted or burned. This example shows two policies that illustrate the spectrum:
Vesting
A vesting contract locks funds until a beneficiary becomes eligible to claim them after a deadline (POSIX time). Two parties, two phases:
Simple Order Book DEX
A worked example of a single-asset order book on Cardano. Each order is its own UTxO at the contract's address; a counterparty fills an order by spending it and paying the owner the agreed amount. Cancellation is permitted by the owner.