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ballot.sol

pragma solidity ^0.4.0;
contract Ballot {

    struct Voter {
        uint weight;
        bool voted;
        uint8 vote;
        address delegate;
    }
    struct Proposal {
        uint voteCount;
    }

    address chairperson;
    mapping(address => Voter) voters;
    Proposal[] proposals;

    /// Create a new ballot with $(_numProposals) different proposals.
    function Ballot(uint8 _numProposals) public {
        chairperson = msg.sender;
        voters[chairperson].weight = 1;
        proposals.length = _numProposals;
    }

    /// Give $(toVoter) the right to vote on this ballot.
    /// May only be called by $(chairperson).
    function giveRightToVote(address toVoter) public {
        if (msg.sender != chairperson || voters[toVoter].voted) return;
        voters[toVoter].weight = 1;
    }

    /// Delegate your vote to the voter $(to).
    function delegate(address to) public {
        Voter storage sender = voters[msg.sender]; // assigns reference
        if (sender.voted) return;
        while (voters[to].delegate != address(0) && voters[to].delegate != msg.sender)
            to = voters[to].delegate;
        if (to == msg.sender) return;
        sender.voted = true;
        sender.delegate = to;
        Voter storage delegateTo = voters[to];
        if (delegateTo.voted)
            proposals[delegateTo.vote].voteCount += sender.weight;
        else
            delegateTo.weight += sender.weight;
    }

    /// Give a single vote to proposal $(toProposal).
    function vote(uint8 toProposal) public {
        Voter storage sender = voters[msg.sender];
        if (sender.voted || toProposal >= proposals.length) return;
        sender.voted = true;
        sender.vote = toProposal;
        proposals[toProposal].voteCount += sender.weight;
    }

    function winningProposal() public constant returns (uint8 _winningProposal) {
        uint256 winningVoteCount = 0;
        for (uint8 prop = 0; prop < proposals.length; prop++)
            if (proposals[prop].voteCount > winningVoteCount) {
                winningVoteCount = proposals[prop].voteCount;
                _winningProposal = prop;
            }
    }
}

FredCoin.sol

pragma solidity ^0.4.0;

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() public {
    owner = msg.sender;
  }

  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}


contract FredCoin is Ownable {
    
    string public name = "FredCoin";
    string public symbol = "FRD";

    
    mapping(address => uint) addressBalance;
    
    mapping(address => bool) whitelist;
    
    event whitelistAccessAtempt(address indexed _who);
    modifier onlyWhitelist{
        if(whitelist[msg.sender] == true){
            _;
        }
        else{
            whitelistAccessAtempt(msg.sender);
        }
    }
    
    function addWhitelist(address _who) onlyOwner{
        whitelist[_who] = true;
    }
    
    
    uint totalTokenSupply;
    uint tokenTransferLimit;
    
    function FredCoin(uint _totalSupply, uint _tokenLimit) public{
        whitelist[msg.sender] = true;
        totalTokenSupply = _totalSupply;
        tokenTransferLimit = _tokenLimit;
        addressBalance[msg.sender] = 1000;
    }
    
    
    function totalSupply() constant onlyWhitelist returns (uint totalSupply){
        totalSupply = totalTokenSupply;
    }
    function transferLimit() constant onlyWhitelist returns (uint transferLimit){
        transferLimit = tokenTransferLimit;
    }
    function setTransferLimit (uint _value) onlyOwner{
        tokenTransferLimit = _value;
    }
    
    function balanceOf(address _owner) onlyWhitelist constant returns (uint balance) {
        return addressBalance[_owner];
    }
    
    event NotEnoughFundsTransactionAttempt(address indexed _from, address indexed _to, uint _value);
    modifier haveEnoughTokens (address _from, address _to, uint _value){
        if(addressBalance[_from] > _value){
            _;
        }
        else{
            NotEnoughFundsTransactionAttempt(_from, _to, _value);
        }
    }
    
    event OverflowTransactionAttempt (address indexed _from, address indexed _to, uint _value);
    modifier stopOverflow (address _from, address _to, uint _value){
        if( addressBalance[_to]  < (addressBalance[_to] + _value) ){
            _;
        }
        else{
            OverflowTransactionAttempt(_from, _to, _value);
        }
    }
    
    event ExceedTransactionLimit (address indexed _from, address indexed _to, uint _value);
    modifier transferLimitExceed (address _from, address _to, uint _value){
        if(_value < tokenTransferLimit){
            _;
        }
        else{
            ExceedTransactionLimit(_from, _to, _value);
        }
    }
    
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    function transfer(address _to, uint256 _value)  onlyWhitelist haveEnoughTokens(msg.sender, _to, _value) stopOverflow(msg.sender, _to, _value) transferLimitExceed(msg.sender, _to, _value) returns (bool success)  {
                
                addressBalance[msg.sender] = addressBalance[msg.sender] - _value;
                addressBalance[_to] = addressBalance[_to] + _value;
                
                Transfer(msg.sender, _to, _value);
    }
    
    

    mapping(address => mapping(address => uint)) approved;
    
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
    function approve(address _spender, uint256 _value) returns (bool success){
        approved[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }
    
    function allowance(address _owner, address _spender) constant returns (uint256 remaining){
        remaining = approved[_owner][_spender];
    }

    function transferFrom(address _from, address _to, uint256 _value)  stopOverflow(_from, _to, _value) haveEnoughTokens(_from, _to, _value) returns (bool success)  {
        if(allowance(_from, _to) > _value){
            addressBalance[_from] = addressBalance[_from] - _value;
            addressBalance[_to] = addressBalance[_to] + _value;
            Transfer(_from, _to, _value);
            return true;
        }
        return false;
    }
}

score.sol

pragma solidity ^0.4.0;

contract Score{
    
    uint myScore;
    address owner;
    string description;
    
    event ScoreSet(uint);
    
    modifier onlyOwner(){
        if(msg.sender == owner){
            _;
        }
    }
    
    function Score() public {
        owner = msg.sender;
    }
    
    function getScore() public view returns (uint) {
        return myScore;
    }
    
    function setScore(uint _score) external {
        myScore = _score;
        ScoreSet(_score);
    }
    
    function setDescription (string _description) public onlyOwner {
        
        description = _description;
    }
    
    
    
}