diff --git a/lib/core/tools/Add-IcingaHashtableItem.psm1 b/lib/core/tools/Add-IcingaHashtableItem.psm1
new file mode 100644
index 0000000..49a2b0e
--- /dev/null
+++ b/lib/core/tools/Add-IcingaHashtableItem.psm1
@@ -0,0 +1,24 @@
+function Add-IcingaHashtableItem()
+{
+    param(
+        $Hashtable,
+        $Key,
+        $Value,
+        [switch]$Override
+    );
+
+    if ($null -eq $Hashtable) {
+        return $FALSE;
+    }
+
+    if ($Hashtable.ContainsKey($Key) -eq $FALSE) {
+        $Hashtable.Add($Key, $Value);
+        return $TRUE;
+    } else {
+        if ($Override) {
+            $Hashtable[$Key] = $Value;
+            return $TRUE;
+        }
+    }
+    return $FALSE;
+}
diff --git a/lib/core/tools/Pop-IcingaArrayListItem.psm1 b/lib/core/tools/Pop-IcingaArrayListItem.psm1
new file mode 100644
index 0000000..b6ed815
--- /dev/null
+++ b/lib/core/tools/Pop-IcingaArrayListItem.psm1
@@ -0,0 +1,19 @@
+function Pop-IcingaArrayListItem()
+{
+    param(
+        [System.Collections.ArrayList]$Array
+    );
+
+    if ($null -eq $Array) {
+        return $null;
+    }
+
+    if ($Array.Count -eq 0) {
+        return $null;
+    }
+
+    $Content = $Array[0];
+    $Array.RemoveAt(0);
+    
+    return $Content;
+}
diff --git a/lib/core/tools/Remove-IcingaHashtableItem.psm1 b/lib/core/tools/Remove-IcingaHashtableItem.psm1
new file mode 100644
index 0000000..8be4987
--- /dev/null
+++ b/lib/core/tools/Remove-IcingaHashtableItem.psm1
@@ -0,0 +1,15 @@
+function Remove-IcingaHashtableItem()
+{
+    param(
+        $Hashtable,
+        $Key
+    );
+
+    if ($null -eq $Hashtable) {
+        return;
+    }
+
+    if ($Hashtable.ContainsKey($Key)) {
+        $Hashtable.Remove($Key);
+    }
+}