Obsidian

// Simple asset ownership transfer in Obsidian
contract Asset {
    string name;

    Asset@Owned(string n) {
        name = n;
    }

    transaction transfer(Asset@Owned >> Asset@Unowned this) {
        // Transfer ownership
        return this;
    }
}

contract Main {
    transaction main() {
        Asset@Owned asset = new Asset("MyAsset");
        asset.transfer();
    }
}