diff --git a/CHANGELOG.md b/CHANGELOG.md
index f744978..179a748 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+ - Added IcdOrderedDictionary collection
+ - Added PriorityQueue collection
 
 ## [3.2.0] - 2018-05-09
 ### Added
diff --git a/ICD.Common.Utils.Tests/Collections/IcdOrderedDictionaryTest.cs b/ICD.Common.Utils.Tests/Collections/IcdOrderedDictionaryTest.cs
new file mode 100644
index 0000000..dc6effd
--- /dev/null
+++ b/ICD.Common.Utils.Tests/Collections/IcdOrderedDictionaryTest.cs
@@ -0,0 +1,126 @@
+using System.Linq;
+using ICD.Common.Utils.Collections;
+using NUnit.Framework;
+
+namespace ICD.Common.Utils.Tests.Collections
+{
+	[TestFixture]
+	public sealed class IcdOrderedDictionaryTest
+	{
+		#region Properties
+
+		[Test]
+		public void CountTest()
+		{
+			IcdOrderedDictionary<int, int> dict = new IcdOrderedDictionary<int, int>
+			{
+				{0, 0},
+				{1, 10},
+				{2, 20}
+			};
+
+			Assert.AreEqual(3, dict.Count);
+		}
+
+		[Test]
+		public void IsReadOnlyTest()
+		{
+			IcdOrderedDictionary<int, int> dict = new IcdOrderedDictionary<int, int>();
+
+			Assert.IsFalse(dict.IsReadOnly);
+		}
+
+		[Test]
+		public void KeysTest()
+		{
+			IcdOrderedDictionary<int, int> dict = new IcdOrderedDictionary<int, int>
+			{
+				{0, 0},
+				{1, 10},
+				{-1, -10}
+			};
+
+			int[] keys = dict.Keys.ToArray();
+
+			Assert.AreEqual(3, keys.Length);
+			Assert.AreEqual(-1, keys[0]);
+			Assert.AreEqual(0, keys[1]);
+			Assert.AreEqual(1, keys[2]);
+		}
+
+		[Test]
+		public void ValuesTest()
+		{
+			IcdOrderedDictionary<int, int> dict = new IcdOrderedDictionary<int, int>
+			{
+				{0, 0},
+				{1, 10},
+				{-1, -10}
+			};
+
+			int[] values = dict.Values.ToArray();
+
+			Assert.AreEqual(3, values.Length);
+			Assert.AreEqual(-10, values[0]);
+			Assert.AreEqual(0, values[1]);
+			Assert.AreEqual(10, values[2]);
+		}
+
+		[Test]
+		public void IndexerTest()
+		{
+			IcdOrderedDictionary<int, int> dict = new IcdOrderedDictionary<int, int>
+			{
+				{0, 0},
+				{1, 10},
+				{-1, -10}
+			};
+
+			Assert.AreEqual(0, dict[0]);
+			Assert.AreEqual(10, dict[1]);
+			Assert.AreEqual(-10, dict[-1]);
+		}
+
+		#endregion
+
+		#region Methods
+
+		[Test]
+		public void GetEnumeratorTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		[Test]
+		public void AddTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		[Test]
+		public void ClearTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		[Test]
+		public void ContainsKeyTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		[Test]
+		public void RemoveTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		[Test]
+		public void TryGetValueTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		#endregion
+	}
+}
diff --git a/ICD.Common.Utils.Tests/Collections/PriorityQueueTest.cs b/ICD.Common.Utils.Tests/Collections/PriorityQueueTest.cs
new file mode 100644
index 0000000..caa319f
--- /dev/null
+++ b/ICD.Common.Utils.Tests/Collections/PriorityQueueTest.cs
@@ -0,0 +1,185 @@
+using System.Collections.Generic;
+using ICD.Common.Utils.Collections;
+using NUnit.Framework;
+
+namespace ICD.Common.Utils.Tests.Collections
+{
+	[TestFixture]
+	public sealed class PriorityQueueTest
+	{
+		#region Properties
+
+		[Test]
+		public void CountTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			Assert.AreEqual(0, queue.Count);
+
+			queue.Enqueue(1);
+			queue.Enqueue(2);
+			queue.Enqueue(3);
+
+			Assert.AreEqual(3, queue.Count);
+
+			queue.Clear();
+
+			Assert.AreEqual(0, queue.Count);
+		}
+
+		[Test]
+		public void IsSynchronizedTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			Assert.IsFalse(queue.IsSynchronized);
+		}
+
+		[Test]
+		public void SyncRootTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			Assert.AreEqual(queue, queue.SyncRoot);
+		}
+
+		#endregion
+
+		#region Methods
+
+		[Test]
+		public void ClearTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			queue.Enqueue(1);
+			queue.Enqueue(2);
+			queue.Enqueue(3);
+
+			Assert.AreEqual(3, queue.Count);
+
+			queue.Clear();
+
+			Assert.AreEqual(0, queue.Count);
+		}
+
+		[Test]
+		public void EnqueueTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			queue.Enqueue(1);
+			queue.Enqueue(2);
+			queue.Enqueue(3);
+
+			Assert.AreEqual(3, queue.Count);
+		}
+
+		[Test]
+		public void EnqueuePriorityTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			queue.Enqueue(1, 3);
+			queue.Enqueue(2, 2);
+			queue.Enqueue(3, 1);
+
+			Assert.AreEqual(3, queue.Count);
+
+			List<int> dequeue = new List<int>
+			{
+				queue.Dequeue(),
+				queue.Dequeue(),
+				queue.Dequeue()
+			};
+
+			Assert.AreEqual(3, dequeue[0]);
+			Assert.AreEqual(2, dequeue[1]);
+			Assert.AreEqual(1, dequeue[2]);
+		}
+
+		[Test]
+		public void EnqueueFirstTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			queue.Enqueue(1, int.MaxValue);
+			queue.Enqueue(2, int.MinValue);
+			queue.EnqueueFirst(3);
+
+			Assert.AreEqual(3, queue.Count);
+
+			Assert.AreEqual(3, queue.Dequeue());
+		}
+
+		[Test]
+		public void EnqueueRemoveTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			queue.Enqueue(1);
+			queue.Enqueue(2);
+			queue.Enqueue(3);
+
+			queue.EnqueueRemove(4, i => i == 2);
+
+			Assert.AreEqual(3, queue.Count);
+
+			List<int> dequeue = new List<int>
+			{
+				queue.Dequeue(),
+				queue.Dequeue(),
+				queue.Dequeue()
+			};
+
+			Assert.AreEqual(1, dequeue[0]);
+			Assert.AreEqual(4, dequeue[1]);
+			Assert.AreEqual(3, dequeue[2]);
+		}
+
+		[Test]
+		public void EnqueueRemovePriorityTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		[Test]
+		public void DequeueTest()
+		{
+			PriorityQueue<int> queue = new PriorityQueue<int>();
+
+			queue.Enqueue(1, 3);
+			queue.Enqueue(2, 2);
+			queue.Enqueue(3, 1);
+
+			Assert.AreEqual(3, queue.Count);
+
+			List<int> dequeue = new List<int>
+			{
+				queue.Dequeue(),
+				queue.Dequeue(),
+				queue.Dequeue()
+			};
+
+			Assert.AreEqual(3, dequeue[0]);
+			Assert.AreEqual(2, dequeue[1]);
+			Assert.AreEqual(1, dequeue[2]);
+
+			Assert.AreEqual(0, queue.Count);
+		}
+
+		[Test]
+		public void GetEnumeratorTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		[Test]
+		public void CopyToTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		#endregion
+	}
+}
diff --git a/ICD.Common.Utils/Collections/IcdOrderedDictionary.cs b/ICD.Common.Utils/Collections/IcdOrderedDictionary.cs
new file mode 100644
index 0000000..a688522
--- /dev/null
+++ b/ICD.Common.Utils/Collections/IcdOrderedDictionary.cs
@@ -0,0 +1,159 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using ICD.Common.Utils.Extensions;
+
+namespace ICD.Common.Utils.Collections
+{
+	public sealed class IcdOrderedDictionary<TKey, TValue> : IDictionary<TKey, TValue>
+	{
+		private readonly List<TKey> m_OrderedKeys;
+		private readonly Dictionary<TKey, TValue> m_Dictionary;
+		private readonly IComparer<TKey> m_Comparer; 
+
+		#region Properties
+
+		public int Count { get { return m_Dictionary.Count; } }
+
+		public bool IsReadOnly { get { return false; } }
+
+		public ICollection<TKey> Keys { get { return m_OrderedKeys; } }
+
+		public ICollection<TValue> Values
+		{
+			get
+			{
+				return m_OrderedKeys.Select(k => m_Dictionary[k])
+				                    .ToArray(Count);
+			}
+		}
+
+		public TValue this[TKey key]
+		{
+			get { return m_Dictionary[key]; }
+			set
+			{
+// ReSharper disable once CompareNonConstrainedGenericWithNull
+				if (key == null)
+					throw new ArgumentNullException("key");
+
+				if (!ContainsKey(key))
+					m_OrderedKeys.AddSorted(key, m_Comparer);
+
+				m_Dictionary[key] = value;
+			}
+		}
+
+		#endregion
+
+		/// <summary>
+		/// Constructor.
+		/// </summary>
+		public IcdOrderedDictionary()
+			: this(Comparer<TKey>.Default)
+		{
+		}
+
+		/// <summary>
+		/// Constructor.
+		/// </summary>
+		/// <param name="comparer"></param>
+		public IcdOrderedDictionary(IComparer<TKey> comparer)
+		{
+			if (comparer == null)
+				throw new ArgumentNullException("comparer");
+
+			m_Comparer = comparer;
+			m_OrderedKeys = new List<TKey>();
+			m_Dictionary = new Dictionary<TKey, TValue>();
+		}
+
+		#region Methods
+
+		public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator()
+		{
+			return m_OrderedKeys.Select(k => new KeyValuePair<TKey, TValue>(k, m_Dictionary[k]))
+			                    .GetEnumerator();
+		}
+
+		public void Add(TKey key, TValue value)
+		{
+// ReSharper disable once CompareNonConstrainedGenericWithNull
+			if (key == null)
+				throw new ArgumentNullException("key");
+
+			if (m_Dictionary.ContainsKey(key))
+				throw new ArgumentException("An item with the same key has already been added.", "key");
+
+			this[key] = value;
+		}
+
+		public void Clear()
+		{
+			m_OrderedKeys.Clear();
+			m_Dictionary.Clear();
+		}
+
+		public bool ContainsKey(TKey key)
+		{
+			return m_Dictionary.ContainsKey(key);
+		}
+
+		public bool Remove(TKey key)
+		{
+// ReSharper disable once CompareNonConstrainedGenericWithNull
+			if (key == null)
+				throw new ArgumentNullException("key");
+
+			if (!m_Dictionary.Remove(key))
+				return false;
+
+			m_OrderedKeys.Remove(key);
+
+			return true;
+		}
+
+		public bool TryGetValue(TKey key, out TValue value)
+		{
+			return m_Dictionary.TryGetValue(key, out value);
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		IEnumerator IEnumerable.GetEnumerator()
+		{
+			return GetEnumerator();
+		}
+
+		void ICollection<KeyValuePair<TKey, TValue>>.Add(KeyValuePair<TKey, TValue> item)
+		{
+			Add(item.Key, item.Value);
+		}
+
+		bool ICollection<KeyValuePair<TKey, TValue>>.Contains(KeyValuePair<TKey, TValue> item)
+		{
+			TValue value;
+			return TryGetValue(item.Key, out value) &&
+			       EqualityComparer<TValue>.Default.Equals(value, item.Value);
+		}
+
+		void ICollection<KeyValuePair<TKey, TValue>>.CopyTo(KeyValuePair<TKey, TValue>[] array, int index)
+		{
+			foreach (KeyValuePair<TKey, TValue> kvp in this)
+			{
+				array.SetValue(kvp, index);
+				index++;
+			}
+		}
+
+		bool ICollection<KeyValuePair<TKey, TValue>>.Remove(KeyValuePair<TKey, TValue> item)
+		{
+			return (this as ICollection<KeyValuePair<TKey, TValue>>).Contains(item) && Remove(item.Key);
+		}
+
+		#endregion
+	}
+}
diff --git a/ICD.Common.Utils/Collections/PriorityQueue.cs b/ICD.Common.Utils/Collections/PriorityQueue.cs
new file mode 100644
index 0000000..e66ddfe
--- /dev/null
+++ b/ICD.Common.Utils/Collections/PriorityQueue.cs
@@ -0,0 +1,244 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using ICD.Common.Properties;
+using ICD.Common.Utils.Extensions;
+
+namespace ICD.Common.Utils.Collections
+{
+	/// <summary>
+	/// Provides a first-in first-out collection with enhanced insertion features.
+	/// </summary>
+	public sealed class PriorityQueue<T> : IEnumerable<T>, ICollection
+	{
+		private readonly IcdOrderedDictionary<int, List<T>> m_PriorityToQueue;
+		private int m_Count;
+
+		#region Properties
+
+		/// <summary>
+		/// Gets the number of items in the collection.
+		/// </summary>
+		public int Count { get { return m_Count; } }
+
+		/// <summary>
+		/// Is the collection thread safe?
+		/// </summary>
+		public bool IsSynchronized { get { return false; } }
+
+		/// <summary>
+		/// Gets a reference for locking.
+		/// </summary>
+		public object SyncRoot { get { return this; } }
+
+		#endregion
+
+		/// <summary>
+		/// Constructor.
+		/// </summary>
+		public PriorityQueue()
+		{
+			m_PriorityToQueue = new IcdOrderedDictionary<int, List<T>>();
+		}
+
+		#region Methods
+
+		/// <summary>
+		/// Clears the collection.
+		/// </summary>
+		[PublicAPI]
+		public void Clear()
+		{
+			m_PriorityToQueue.Clear();
+			m_Count = 0;
+		}
+
+		/// <summary>
+		/// Adds the item to the end of the queue.
+		/// </summary>
+		/// <param name="item"></param>
+		[PublicAPI]
+		public void Enqueue(T item)
+		{
+			Enqueue(item, int.MaxValue);
+		}
+
+		/// <summary>
+		/// Adds the item to the queue with the given priority.
+		/// Lower values are dequeued first.
+		/// </summary>
+		/// <param name="item"></param>
+		/// <param name="priority"></param>
+		[PublicAPI]
+		public void Enqueue(T item, int priority)
+		{
+			if (!m_PriorityToQueue.ContainsKey(priority))
+				m_PriorityToQueue.Add(priority, new List<T>());
+
+			m_PriorityToQueue[priority].Add(item);
+			m_Count++;
+		}
+
+		/// <summary>
+		/// Enqueues the item at the beginning of the queue.
+		/// </summary>
+		/// <param name="item"></param>
+		[PublicAPI]
+		public void EnqueueFirst(T item)
+		{
+			const int priority = int.MinValue;
+
+			if (!m_PriorityToQueue.ContainsKey(priority))
+				m_PriorityToQueue.Add(priority, new List<T>());
+
+			m_PriorityToQueue[priority].Insert(0, item);
+			m_Count++;
+		}
+
+		/// <summary>
+		/// Removes any items in the queue matching the predicate.
+		/// Inserts the given item in the position of the first removed item, or at the end of the queue.
+		/// This is useful for reducing duplication, or replacing items with something more pertinant.
+		/// </summary>
+		/// <param name="item"></param>
+		/// <param name="remove"></param>
+		[PublicAPI]
+		public void EnqueueRemove(T item, Func<T, bool> remove)
+		{
+			if (remove == null)
+				throw new ArgumentNullException("remove");
+
+			EnqueueRemove(item, remove, int.MaxValue);
+		}
+
+		/// <summary>
+		/// Removes any items in the queue matching the predicate.
+		/// Inserts the given item in the position of the first removed item, or at the end of the queue.
+		/// This is useful for reducing duplication, or replacing items with something more pertinant.
+		/// </summary>
+		/// <param name="item"></param>
+		/// <param name="remove"></param>
+		/// <param name="priority"></param>
+		[PublicAPI]
+		public void EnqueueRemove(T item, Func<T, bool> remove, int priority)
+		{
+			if (remove == null)
+				throw new ArgumentNullException("remove");
+
+			bool inserted = false;
+
+			foreach (KeyValuePair<int, List<T>> kvp in m_PriorityToQueue)
+			{
+				int[] removeIndices =
+					kvp.Value
+					   .FindIndices(v => remove(v))
+					   .Reverse()
+					   .ToArray();
+
+				if (removeIndices.Length == 0)
+					continue;
+
+				foreach (int removeIndex in removeIndices)
+				{
+					kvp.Value.RemoveAt(removeIndex);
+					m_Count--;
+				}
+
+				if (!inserted)
+				{
+					int insertIndex = removeIndices[0];
+					kvp.Value.Insert(insertIndex, item);
+					m_Count++;
+
+					inserted = true;
+				}
+			}
+
+			if (!inserted)
+				Enqueue(item, priority);
+		}
+
+		/// <summary>
+		/// Dequeues the first item with the lowest priority value.
+		/// </summary>
+		/// <returns></returns>
+		[PublicAPI]
+		public T Dequeue()
+		{
+			T output;
+			if (TryDequeue(out output))
+				return output;
+
+			throw new InvalidOperationException("The queue is empty.");
+		}
+
+		/// <summary>
+		/// Attempts to dequeue an item from the queue.
+		/// </summary>
+		/// <param name="output"></param>
+		/// <returns></returns>
+		[PublicAPI]
+		public bool TryDequeue(out T output)
+		{
+			output = default(T);
+
+			KeyValuePair<int, List<T>> kvp;
+			if (!m_PriorityToQueue.TryFirst(out kvp))
+				return false;
+
+			int priority = kvp.Key;
+			List<T> queue = kvp.Value;
+
+			output = queue[0];
+			queue.RemoveAt(0);
+
+			if (queue.Count == 0)
+				m_PriorityToQueue.Remove(priority);
+
+			m_Count--;
+
+			return true;
+		}
+
+		/// <summary>
+		/// Gets an enumerator for the items.
+		/// </summary>
+		/// <returns></returns>
+		public IEnumerator<T> GetEnumerator()
+		{
+			return m_PriorityToQueue.Values
+			                        .SelectMany(v => v)
+			                        .GetEnumerator();
+		}
+
+		/// <summary>
+		/// Copies the collection to the target array.
+		/// </summary>
+		/// <param name="array"></param>
+		/// <param name="index"></param>
+		public void CopyTo(Array array, int index)
+		{
+			foreach (T item in this)
+			{
+				array.SetValue(item, index);
+				index++;
+			}
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		/// <summary>
+		/// Gets an enumerator for the items.
+		/// </summary>
+		/// <returns></returns>
+		IEnumerator IEnumerable.GetEnumerator()
+		{
+			return GetEnumerator();
+		}
+
+		#endregion
+	}
+}
diff --git a/ICD.Common.Utils/ICD.Common.Utils_SimplSharp.csproj b/ICD.Common.Utils/ICD.Common.Utils_SimplSharp.csproj
index ece69a3..87c6a3b 100644
--- a/ICD.Common.Utils/ICD.Common.Utils_SimplSharp.csproj
+++ b/ICD.Common.Utils/ICD.Common.Utils_SimplSharp.csproj
@@ -74,6 +74,8 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Attributes\AbstractIcdAttribute.cs" />
+    <Compile Include="Collections\IcdOrderedDictionary.cs" />
+    <Compile Include="Collections\PriorityQueue.cs" />
     <Compile Include="Collections\WeakKeyDictionary.cs" />
     <Compile Include="Comparers\PredicateComparer.cs" />
     <Compile Include="ConsoleColor.cs" />