diff --git a/README.md b/README.md
index dbdb39f8c..bf8353e83 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,8 @@ With Zeppelin, you can build distributed applications, protocols and organizatio
 - using common contract security patterns (See [Onward with Ethereum Smart Contract Security](https://medium.com/bitcorps-blog/onward-with-ethereum-smart-contract-security-97a827e47702#.y3kvdetbz))
 - in the [Solidity language](http://solidity.readthedocs.io/en/develop/).
 
+> NOTE: New to smart contract development? Check our [introductory guide](https://medium.com/zeppelin-blog/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05#.cox40d2ut).
+
 ## Getting Started
 
 Zeppelin integrates with [Truffle](https://github.com/ConsenSys/truffle), an Ethereum development environment. Please install Truffle and initialize your project with `truffle init`.
diff --git a/contracts/DayLimit.sol b/contracts/DayLimit.sol
index d4f1cb521..41f9e4994 100644
--- a/contracts/DayLimit.sol
+++ b/contracts/DayLimit.sol
@@ -11,7 +11,7 @@ import './Shareable.sol';
  * on a particular resource per calendar day. is multiowned to allow the limit to be altered. resource that method
  * uses is specified in the modifier.
  */
-contract DayLimit is Shareable {
+contract DayLimit {
   // FIELDS
 
   uint public dailyLimit;
@@ -38,13 +38,13 @@ contract DayLimit is Shareable {
 
   // METHODS
 
-  // (re)sets the daily limit. needs many of the owners to confirm. doesn't alter the amount already spent today.
-  function setDailyLimit(uint _newLimit) onlymanyowners(sha3(msg.data)) external {
+  // (re)sets the daily limit. doesn't alter the amount already spent today.
+  function _setDailyLimit(uint _newLimit) internal {
     dailyLimit = _newLimit;
   }
 
-  // resets the amount already spent today. needs many of the owners to confirm
-  function resetSpentToday() onlymanyowners(sha3(msg.data)) external {
+  // resets the amount already spent today.
+  function _resetSpentToday() internal {
     spentToday = 0;
   }
 
@@ -53,14 +53,14 @@ contract DayLimit is Shareable {
 
   // checks to see if there is at least `_value` left from the daily limit today. if there is, subtracts it and
   // returns true. otherwise just returns false.
-  function underLimit(uint _value) internal onlyOwner returns (bool) {
+  function underLimit(uint _value) internal returns (bool) {
     // reset the spend limit if we're on a different day to last time.
     if (today() > lastDay) {
       spentToday = 0;
       lastDay = today();
     }
     // check to see if there's enough left - if so, subtract and return true.
-    // overflow protection                    // dailyLimit check  
+    // overflow protection                    // dailyLimit check
     if (spentToday + _value >= spentToday && spentToday + _value <= dailyLimit) {
       spentToday += _value;
       return true;
diff --git a/contracts/MultisigWallet.sol b/contracts/MultisigWallet.sol
index 1eb24c091..867de28ff 100644
--- a/contracts/MultisigWallet.sol
+++ b/contracts/MultisigWallet.sol
@@ -83,6 +83,14 @@ contract MultisigWallet is Multisig, Shareable, DayLimit {
     }
   }
 
+  function setDailyLimit(uint _newLimit) onlymanyowners(sha3(msg.data)) external {
+    _setDailyLimit(_newLimit);
+  }
+
+  function resetSpentToday() onlymanyowners(sha3(msg.data)) external {
+    _resetSpentToday();
+  }
+
 
   // INTERNAL METHODS
 
diff --git a/contracts/Shareable.sol b/contracts/Shareable.sol
index b73f31eee..d416f80be 100644
--- a/contracts/Shareable.sol
+++ b/contracts/Shareable.sol
@@ -4,7 +4,7 @@ pragma solidity ^0.4.4;
 /*
  * Shareable
  *
- * Based on https://github.com/ethereum/dapp-bin/blob/master/wallet/wallet.sol 
+ * Based on https://github.com/ethereum/dapp-bin/blob/master/wallet/wallet.sol
  *
  * inheritable "property" contract that enables methods to be protected by requiring the acquiescence of either a single, or, crucially, each of a number of, designated owners.
  *
@@ -98,7 +98,7 @@ contract Shareable {
     return address(owners[ownerIndex + 1]);
   }
 
-  function isOwner(address _addr) returns (bool) {
+  function isOwner(address _addr) constant returns (bool) {
     return ownerIndex[uint(_addr)] > 0;
   }
 
@@ -162,4 +162,3 @@ contract Shareable {
   }
 
 }
-
diff --git a/contracts/examples/BadPushPayments.sol b/contracts/examples/BadPushPayments.sol
index 2d85ffeec..7bc11c665 100644
--- a/contracts/examples/BadPushPayments.sol
+++ b/contracts/examples/BadPushPayments.sol
@@ -7,7 +7,7 @@ contract BadPushPayments {
 	address highestBidder;
 	uint highestBid;
 
-	function bid() {
+	function bid() payable {
 		if (msg.value < highestBid) throw;
 
 		if (highestBidder != 0) {
diff --git a/contracts/examples/GoodPullPayments.sol b/contracts/examples/GoodPullPayments.sol
index 1469eb57f..fc0cd986b 100644
--- a/contracts/examples/GoodPullPayments.sol
+++ b/contracts/examples/GoodPullPayments.sol
@@ -6,7 +6,7 @@ contract GoodPullPayments {
   uint highestBid;
   mapping(address => uint) refunds;
 
-  function bid() external {
+  function bid() external payable {
     if (msg.value < highestBid) throw;
 
     if (highestBidder != 0) {
diff --git a/contracts/examples/PullPaymentBid.sol b/contracts/examples/PullPaymentBid.sol
index ad4b612b5..8ba51422f 100644
--- a/contracts/examples/PullPaymentBid.sol
+++ b/contracts/examples/PullPaymentBid.sol
@@ -8,7 +8,7 @@ contract PullPaymentBid is PullPayment {
   address public highestBidder;
   uint public highestBid;
   
-  function bid() external {
+  function bid() external payable {
     if (msg.value <= highestBid) throw;
     
     if (highestBidder != 0) {
diff --git a/contracts/examples/StoppableBid.sol b/contracts/examples/StoppableBid.sol
index 61b9d43aa..53e1aebdc 100644
--- a/contracts/examples/StoppableBid.sol
+++ b/contracts/examples/StoppableBid.sol
@@ -9,7 +9,7 @@ contract StoppableBid is Stoppable, PullPayment {
   address public highestBidder;
   uint public highestBid;
 
-  function bid() external stopInEmergency {
+  function bid() external payable stopInEmergency {
     if (msg.value <= highestBid) throw;
     
     if (highestBidder != 0) {
diff --git a/contracts/test-helpers/DayLimitMock.sol b/contracts/test-helpers/DayLimitMock.sol
new file mode 100644
index 000000000..0ba5ca23f
--- /dev/null
+++ b/contracts/test-helpers/DayLimitMock.sol
@@ -0,0 +1,23 @@
+pragma solidity ^0.4.4;
+import "../DayLimit.sol";
+
+contract DayLimitMock is DayLimit {
+  uint public totalSpending;
+
+  function DayLimitMock(uint _value) DayLimit(_value) {
+    totalSpending = 0;
+  }
+
+  function attemptSpend(uint _value) external limitedDaily(_value) {
+    totalSpending += _value;
+  }
+
+  function setDailyLimit(uint _newLimit) external {
+    _setDailyLimit(_newLimit);
+  }
+
+  function resetSpentToday() external {
+    _resetSpentToday();
+  }
+
+}
diff --git a/contracts/test-helpers/MultisigWalletMock.sol b/contracts/test-helpers/MultisigWalletMock.sol
new file mode 100644
index 000000000..19adc558d
--- /dev/null
+++ b/contracts/test-helpers/MultisigWalletMock.sol
@@ -0,0 +1,12 @@
+pragma solidity ^0.4.4;
+import "../MultisigWallet.sol";
+
+contract MultisigWalletMock is MultisigWallet {
+  uint public totalSpending;
+
+  function MultisigWalletMock(address[] _owners, uint _required, uint _daylimit)
+    MultisigWallet(_owners, _required, _daylimit) payable { }
+
+  function changeOwner(address _from, address _to) external { }
+
+}
diff --git a/contracts/test-helpers/ShareableMock.sol b/contracts/test-helpers/ShareableMock.sol
new file mode 100644
index 000000000..ebf06546e
--- /dev/null
+++ b/contracts/test-helpers/ShareableMock.sol
@@ -0,0 +1,16 @@
+pragma solidity ^0.4.4;
+import "../Shareable.sol";
+
+contract ShareableMock is Shareable {
+
+  uint public count = 0;
+
+  function ShareableMock(address[] _owners, uint _required) Shareable(_owners, _required) {
+
+  }
+
+  function increaseCount(bytes32 action) onlymanyowners(action) {
+    count = count + 1;
+  }
+
+}
diff --git a/test/DayLimit.js b/test/DayLimit.js
new file mode 100644
index 000000000..559001f5d
--- /dev/null
+++ b/test/DayLimit.js
@@ -0,0 +1,72 @@
+contract('DayLimit', function(accounts) {
+
+  it('should construct with the passed daily limit', async function() {
+    let initLimit = 10;
+    let dayLimit = await DayLimitMock.new(initLimit);
+    let dailyLimit = await dayLimit.dailyLimit();
+    assert.equal(initLimit, dailyLimit);
+  });
+
+  it('should be able to spend if daily limit is not reached', async function() {
+    let limit = 10;
+    let dayLimit = await DayLimitMock.new(limit);
+
+    await dayLimit.attemptSpend(8);
+    let spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 8);
+
+    await dayLimit.attemptSpend(2);
+    spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 10);
+  });
+
+  it('should prevent spending if daily limit is reached', async function() {
+    let limit = 10;
+    let dayLimit = await DayLimitMock.new(limit);
+
+    await dayLimit.attemptSpend(8);
+    let spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 8);
+
+    await dayLimit.attemptSpend(3);
+    spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 8);
+  });
+
+  it('should allow spending if daily limit is reached and then set higher', async function() {
+    let limit = 10;
+    let dayLimit = await DayLimitMock.new(limit);
+
+    await dayLimit.attemptSpend(8);
+    let spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 8);
+
+    await dayLimit.attemptSpend(3);
+    spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 8);
+
+    await dayLimit.setDailyLimit(15);
+    await dayLimit.attemptSpend(3);
+    spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 11);
+  });
+
+  it('should allow spending if daily limit is reached and then amount spent is reset', async function() {
+    let limit = 10;
+    let dayLimit = await DayLimitMock.new(limit);
+
+    await dayLimit.attemptSpend(8);
+    let spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 8);
+
+    await dayLimit.attemptSpend(3);
+    spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 8);
+
+    await dayLimit.resetSpentToday(15);
+    await dayLimit.attemptSpend(3);
+    spentToday = await dayLimit.spentToday();
+    assert.equal(spentToday, 3);
+  });
+
+});
diff --git a/test/MultisigWallet.js b/test/MultisigWallet.js
new file mode 100644
index 000000000..32c1ec781
--- /dev/null
+++ b/test/MultisigWallet.js
@@ -0,0 +1,163 @@
+contract('MultisigWallet', function(accounts) {
+  //from https://gist.github.com/xavierlepretre/88682e871f4ad07be4534ae560692ee6
+  web3.eth.getTransactionReceiptMined = function (txnHash, interval) {
+    var transactionReceiptAsync;
+    interval = interval ? interval : 500;
+    transactionReceiptAsync = function(txnHash, resolve, reject) {
+        try {
+            var receipt = web3.eth.getTransactionReceipt(txnHash);
+            if (receipt == null) {
+                setTimeout(function () {
+                    transactionReceiptAsync(txnHash, resolve, reject);
+                }, interval);
+            } else {
+                resolve(receipt);
+            }
+        } catch(e) {
+            reject(e);
+        }
+    };
+
+    if (Array.isArray(txnHash)) {
+        var promises = [];
+        txnHash.forEach(function (oneTxHash) {
+            promises.push(web3.eth.getTransactionReceiptMined(oneTxHash, interval));
+        });
+        return Promise.all(promises);
+    } else {
+        return new Promise(function (resolve, reject) {
+                transactionReceiptAsync(txnHash, resolve, reject);
+            });
+    }
+};
+
+
+  it('should send balance to passed address upon death', async function() {
+    //Give account[0] 20 ether
+    web3.eth.sendTransaction({from: web3.eth.coinbase, to: accounts[0], value: web3.toWei('20','ether')}, function(err, result) {
+      if(err)
+        console.log("ERROR:" + err);
+    });
+
+    let dailyLimit = 10;
+    let ownersRequired = 2;
+
+    //Create MultisigWallet contract with 10 ether
+    let wallet = await MultisigWalletMock.new(accounts, ownersRequired, dailyLimit, {value: web3.toWei('10', 'ether')});
+
+    //Get balances of owner and wallet after wallet creation.
+    let ownerBalance = web3.eth.getBalance(accounts[0]);
+    let walletBalance = web3.eth.getBalance(wallet.address);
+    let hash = 1234;
+
+    //Call kill function from two different owner accounts, satisfying owners required
+    await wallet.kill(accounts[0], {data: hash});
+    let txnHash = await wallet.kill(accounts[0], {from: accounts[1], data: hash});
+
+    let receiptMined = await web3.eth.getTransactionReceiptMined(txnHash);
+
+    //Get balances of owner and wallet after kill function is complete, compare with previous values
+    let newOwnerBalance = web3.eth.getBalance(accounts[0]);
+    let newWalletBalance = web3.eth.getBalance(wallet.address);
+
+    assert.isTrue(newOwnerBalance > ownerBalance);
+    assert.isTrue(newWalletBalance < walletBalance);
+  });
+
+  it('should execute transaction if below daily limit', async function() {
+    //Give account[0] 20 ether
+    web3.eth.sendTransaction({from: web3.eth.coinbase, to: accounts[0], value: web3.toWei('20','ether')}, function(err, result) {
+      if(err)
+        console.log("ERROR:" + err);
+    });
+
+    let dailyLimit = 10;
+    let ownersRequired = 2;
+
+    //Create MultisigWallet contract with 10 ether
+    let wallet = await MultisigWalletMock.new(accounts, ownersRequired, dailyLimit, {value: web3.toWei('10', 'ether')});
+
+    let accountBalance = web3.eth.getBalance(accounts[2]);
+    let hash = 1234;
+
+    //Owner account0 commands wallet to send 9 wei to account2
+    let txnHash = await wallet.execute(accounts[2], 9, hash);
+    let receiptMined = await web3.eth.getTransactionReceiptMined(txnHash);
+
+    //Balance of account2 should have increased
+    let newAccountBalance = web3.eth.getBalance(accounts[2]);
+    assert.isTrue(newAccountBalance > accountBalance);
+  });
+
+  it('should prevent execution of transaction if above daily limit', async function() {
+    //Give account[0] 20 ether
+    web3.eth.sendTransaction({from: web3.eth.coinbase, to: accounts[0], value: web3.toWei('20','ether')}, function(err, result) {
+      if(err)
+        console.log("ERROR:" + err);
+    });
+
+    let dailyLimit = 10;
+    let ownersRequired = 2;
+
+    //Create MultisigWallet contract with 10 ether
+    let wallet = await MultisigWalletMock.new(accounts, ownersRequired, dailyLimit, {value: web3.toWei('10', 'ether')});
+
+    let accountBalance = web3.eth.getBalance(accounts[2]);
+    let hash = 1234;
+
+    //Owner account0 commands wallet to send 9 wei to account2
+    let txnHash = await wallet.execute(accounts[2], 9, hash);
+    let receiptMined = await web3.eth.getTransactionReceiptMined(txnHash);
+
+    //Balance of account2 should have increased
+    let newAccountBalance = web3.eth.getBalance(accounts[2]);
+    assert.isTrue(newAccountBalance > accountBalance);
+
+    accountBalance = newAccountBalance;
+    hash = 4567;
+
+    //Owner account0 commands wallet to send 2 more wei to account2, going over the daily limit of 10
+    txnHash = await wallet.execute(accounts[2], 2, hash);
+    receiptMined = await web3.eth.getTransactionReceiptMined(txnHash);
+
+    //Balance of account2 should not change
+    newAccountBalance = web3.eth.getBalance(accounts[2]);
+    assert.equal(newAccountBalance.toString(), accountBalance.toString());
+  });
+
+  it('should execute transaction if above daily limit and enough owners approve', async function() {
+    //Give account[0] 20 ether
+    web3.eth.sendTransaction({from: web3.eth.coinbase, to: accounts[0], value: web3.toWei('20','ether')}, function(err, result) {
+      if(err)
+        console.log("ERROR:" + err);
+    });
+
+    let dailyLimit = 10;
+    let ownersRequired = 2;
+
+    //Create MultisigWallet contract with 10 ether
+    let wallet = await MultisigWalletMock.new(accounts, ownersRequired, dailyLimit, {value: web3.toWei('10', 'ether')});
+
+    let accountBalance = web3.eth.getBalance(accounts[2]);
+    let hash = 1234;
+
+    //Owner account0 commands wallet to send 11 wei to account2
+    let txnHash = await wallet.execute(accounts[2], 11, hash);
+    let receiptMined = await web3.eth.getTransactionReceiptMined(txnHash);
+
+    //Balance of account2 should not change
+    let newAccountBalance = web3.eth.getBalance(accounts[2]);
+    assert.equal(newAccountBalance.toString(), accountBalance.toString());
+
+    accountBalance = newAccountBalance;
+
+    //Owner account1 commands wallet to send 11 wei to account2
+    txnHash = await wallet.execute(accounts[2], 2, hash);
+    receiptMined = await web3.eth.getTransactionReceiptMined(txnHash);
+
+    //Balance of account2 should change
+    newAccountBalance = web3.eth.getBalance(accounts[2]);
+    assert.isTrue(newAccountBalance > accountBalance);
+  });
+
+});
diff --git a/test/Shareable.js b/test/Shareable.js
new file mode 100644
index 000000000..fba268268
--- /dev/null
+++ b/test/Shareable.js
@@ -0,0 +1,101 @@
+contract('Shareable', function(accounts) {
+
+  it('should construct with correct owners and number of sigs required', async function() {
+    let requiredSigs = 2;
+    let owners = accounts.slice(1,4);
+    let shareable = await ShareableMock.new(owners, requiredSigs);
+
+    let required = await shareable.required();
+    assert.equal(required, requiredSigs);
+    let owner = await shareable.getOwner(0);
+    assert.equal(owner, accounts[0]);
+
+    for(let i = 0; i < accounts.length; i++) {
+      let owner = await shareable.getOwner(i);
+      let isowner = await shareable.isOwner(accounts[i]);
+      if(i <= owners.length) {
+        assert.equal(accounts[i], owner);
+        assert.isTrue(isowner);
+      } else {
+        assert.notEqual(accounts[i], owner);
+        assert.isFalse(isowner);
+      }
+    }
+  });
+
+  it('should only perform multisig function with enough sigs', async function() {
+    let requiredSigs = 3;
+    let owners = accounts.slice(1,4);
+    let shareable = await ShareableMock.new(owners, requiredSigs);
+    let hash = 1234;
+
+    let initCount = await shareable.count();
+    initCount = initCount.toString();
+
+    for(let i = 0; i < requiredSigs; i++) {
+      await shareable.increaseCount(hash, {from: accounts[i]});
+      let count = await shareable.count();
+      if(i == requiredSigs - 1) {
+        assert.equal(Number(initCount)+1, count.toString());
+      } else {
+        assert.equal(initCount, count.toString());
+      }
+    }
+  });
+
+  it('should require approval from different owners', async function() {
+    let requiredSigs = 2;
+    let owners = accounts.slice(1,4);
+    let shareable = await ShareableMock.new(owners, requiredSigs);
+    let hash = 1234;
+
+    let initCount = await shareable.count();
+    initCount = initCount.toString();
+
+    //Count shouldn't increase when the same owner calls repeatedly
+    for(let i = 0; i < 2; i++) {
+      await shareable.increaseCount(hash);
+      let count = await shareable.count();
+      assert.equal(initCount, count.toString());
+    }
+  });
+
+  it('should reset sig count after operation is approved', async function() {
+    let requiredSigs = 3;
+    let owners = accounts.slice(1,4);
+    let shareable = await ShareableMock.new(owners, requiredSigs);
+    let hash = 1234;
+
+    let initCount = await shareable.count();
+
+    for(let i = 0; i < requiredSigs * 3; i++) {
+      await shareable.increaseCount(hash, {from: accounts[i % 4]});
+      let count = await shareable.count();
+      if((i%(requiredSigs)) == requiredSigs - 1) {
+        initCount = Number(initCount)+1;
+        assert.equal(initCount, count);
+      } else {
+        assert.equal(initCount.toString(), count);
+      }
+    }
+  });
+
+  it('should not perform multisig function after an owner revokes', async function() {
+    let requiredSigs = 3;
+    let owners = accounts.slice(1,4);
+    let shareable = await ShareableMock.new(owners, requiredSigs);
+    let hash = 1234;
+
+    let initCount = await shareable.count();
+
+    for(let i = 0; i < requiredSigs; i++) {
+      if(i == 1) {
+        await shareable.revoke(hash, {from: accounts[i-1]});
+      }
+      await shareable.increaseCount(hash, {from: accounts[i]});
+      let count = await shareable.count();
+      assert.equal(initCount.toString(), count);
+    }
+  });
+
+});