diff --git a/plugins/Toolbox/resources/qml/ToolboxDownloadsGridTile.qml b/plugins/Toolbox/resources/qml/ToolboxDownloadsGridTile.qml
index 89966caba4..41d09d19ab 100644
--- a/plugins/Toolbox/resources/qml/ToolboxDownloadsGridTile.qml
+++ b/plugins/Toolbox/resources/qml/ToolboxDownloadsGridTile.qml
@@ -63,7 +63,7 @@ Item
             Label
             {
                 id: name
-                text: model.name
+                text: toolbox.viewCategory == "material" ? model.name + " (" + toolbox.getNumberOfInstalledPackagesByAuthor(model.id) + "/" + model.package_count + ")" : model.name
                 width: parent.width
                 wrapMode: Text.WordWrap
                 color: UM.Theme.getColor("text")
diff --git a/plugins/Toolbox/src/AuthorsModel.py b/plugins/Toolbox/src/AuthorsModel.py
index 880ecbe2a0..45424d7e42 100644
--- a/plugins/Toolbox/src/AuthorsModel.py
+++ b/plugins/Toolbox/src/AuthorsModel.py
@@ -43,7 +43,7 @@ class AuthorsModel(ListModel):
                 "package_count":  author["package_count"] if "package_count" in author else 0,
                 "package_types":  author["package_types"] if "package_types" in author else [],
                 "icon_url":       author["icon_url"] if "icon_url" in author else None,
-                "description":    "Material and quality profiles from {author_name}".format( author_name = author["display_name"])
+                "description":    "Material and quality profiles from {author_name}".format(author_name = author["display_name"])
             })
 
         # Filter on all the key-word arguments.
diff --git a/plugins/Toolbox/src/Toolbox.py b/plugins/Toolbox/src/Toolbox.py
index b1128722e9..bf91b817a0 100644
--- a/plugins/Toolbox/src/Toolbox.py
+++ b/plugins/Toolbox/src/Toolbox.py
@@ -501,6 +501,15 @@ class Toolbox(QObject, Extension):
     def isInstalled(self, package_id: str) -> bool:
         return self._package_manager.isPackageInstalled(package_id)
 
+    @pyqtSlot(str, result = int)
+    def getNumberOfInstalledPackagesByAuthor(self, author_id: str) -> int:
+        count = 0
+        for package in self._metadata["materials_installed"]:
+            if package["author"]["author_id"] == author_id:
+                if self.isInstalled(package["package_id"]):
+                    count += 1
+        return count
+
     @pyqtSlot(str, result = bool)
     def isEnabled(self, package_id: str) -> bool:
         if package_id in self._plugin_registry.getActivePlugins():
@@ -722,27 +731,27 @@ class Toolbox(QObject, Extension):
     # --------------------------------------------------------------------------
     @pyqtProperty(QObject, notify = metadataChanged)
     def authorsModel(self) -> AuthorsModel:
-        return self._models["authors"]
+        return cast(AuthorsModel, self._models["authors"])
 
     @pyqtProperty(QObject, notify = metadataChanged)
     def packagesModel(self) -> PackagesModel:
-        return self._models["packages"]
+        return cast(PackagesModel, self._models["packages"])
 
     @pyqtProperty(QObject, notify = metadataChanged)
     def pluginsShowcaseModel(self) -> PackagesModel:
-        return self._models["plugins_showcase"]
+        return cast(PackagesModel, self._models["plugins_showcase"])
 
     @pyqtProperty(QObject, notify = metadataChanged)
     def pluginsInstalledModel(self) -> PackagesModel:
-        return self._models["plugins_installed"]
+        return cast(PackagesModel, self._models["plugins_installed"])
 
     @pyqtProperty(QObject, notify = metadataChanged)
-    def materialsShowcaseModel(self) -> PackagesModel:
-        return self._models["materials_showcase"]
+    def materialsShowcaseModel(self) -> AuthorsModel:
+        return cast(AuthorsModel, self._models["materials_showcase"])
 
     @pyqtProperty(QObject, notify = metadataChanged)
     def materialsInstalledModel(self) -> PackagesModel:
-        return self._models["materials_installed"]
+        return cast(PackagesModel, self._models["materials_installed"])