diff --git a/importer/indico_importer/plugin.py b/importer/indico_importer/plugin.py
index a354eb4..8df477d 100644
--- a/importer/indico_importer/plugin.py
+++ b/importer/indico_importer/plugin.py
@@ -32,6 +32,7 @@ class ImporterPlugin(IndicoPlugin):
     """
 
     hidden = True
+    category = 'import'
 
     def init(self):
         super(ImporterPlugin, self).init()
diff --git a/importer_invenio/indico_importer_invenio/plugin.py b/importer_invenio/indico_importer_invenio/plugin.py
index 1e3a87d..c0fc3d9 100644
--- a/importer_invenio/indico_importer_invenio/plugin.py
+++ b/importer_invenio/indico_importer_invenio/plugin.py
@@ -30,3 +30,4 @@ class ImporterInvenioPlugin(ImporterSourcePluginBase):
 
     importer_engine_classes = (InvenioImporter,)
     settings_form = SettingsForm
+    category = 'import'
diff --git a/livesync/indico_livesync/base.py b/livesync/indico_livesync/base.py
index 1f9b3e1..9cc169a 100644
--- a/livesync/indico_livesync/base.py
+++ b/livesync/indico_livesync/base.py
@@ -34,6 +34,7 @@ class LiveSyncPluginBase(IndicoPlugin):  # pragma: no cover
 
     #: dict containing the backend(s) provided by the plugin; the keys are unique identifiers
     backend_classes = None
+    category = 'synchronization'
 
     def init(self):
         super(LiveSyncPluginBase, self).init()
diff --git a/livesync_debug/indico_livesync_debug/plugin.py b/livesync_debug/indico_livesync_debug/plugin.py
index ff9dadb..81238d4 100644
--- a/livesync_debug/indico_livesync_debug/plugin.py
+++ b/livesync_debug/indico_livesync_debug/plugin.py
@@ -28,3 +28,4 @@ class LiveSyncDebugPlugin(LiveSyncPluginBase):
     """
 
     backend_classes = {'debug': LiveSyncDebugBackend}
+    category = 'synchronization'
diff --git a/livesync_invenio/indico_livesync_invenio/plugin.py b/livesync_invenio/indico_livesync_invenio/plugin.py
index 803692a..5501e98 100644
--- a/livesync_invenio/indico_livesync_invenio/plugin.py
+++ b/livesync_invenio/indico_livesync_invenio/plugin.py
@@ -28,3 +28,4 @@ class InvenioLiveSyncPlugin(LiveSyncPluginBase):
     """
 
     backend_classes = {'invenio': InvenioLiveSyncBackend}
+    category = 'synchronization'
diff --git a/payment_manual/indico_payment_manual/plugin.py b/payment_manual/indico_payment_manual/plugin.py
index 0c11f29..c0f8176 100644
--- a/payment_manual/indico_payment_manual/plugin.py
+++ b/payment_manual/indico_payment_manual/plugin.py
@@ -45,6 +45,7 @@ class ManualPaymentPlugin(PaymentPluginMixin, IndicoPlugin):
     who then pays manually using e.g. a wire transfer. Marking the registrant
     as paid is then done manually by a manager of the event.
     """
+    category = 'payment'
     settings_form = PluginSettingsForm
     event_settings_form = EventSettingsForm
     default_settings = {'method_name': 'Bank Transfer'}
diff --git a/payment_paypal/indico_payment_paypal/plugin.py b/payment_paypal/indico_payment_paypal/plugin.py
index b217756..3943940 100644
--- a/payment_paypal/indico_payment_paypal/plugin.py
+++ b/payment_paypal/indico_payment_paypal/plugin.py
@@ -42,6 +42,7 @@ class EventSettingsForm(PaymentEventSettingsFormBase):
 class PaypalPaymentPlugin(PaymentPluginMixin, IndicoPlugin):
     """Payment: PayPal
     """
+    category = 'payment'
     settings_form = PluginSettingsForm
     event_settings_form = EventSettingsForm
     default_settings = {'method_name': 'PayPal',
diff --git a/piwik/indico_piwik/plugin.py b/piwik/indico_piwik/plugin.py
index ea5e9e5..badb8bb 100644
--- a/piwik/indico_piwik/plugin.py
+++ b/piwik/indico_piwik/plugin.py
@@ -37,7 +37,6 @@ class PiwikPlugin(IndicoPlugin):
 
     Retrieves piwik statistics for conferences, meetings and contributions.
     """
-
     settings_form = SettingsForm
     report_script = 'index.php'
     track_script = 'piwik.php'
diff --git a/search/indico_search/base.py b/search/indico_search/base.py
index 93666e3..cd5a018 100644
--- a/search/indico_search/base.py
+++ b/search/indico_search/base.py
@@ -31,6 +31,7 @@ class SearchPluginBase(IndicoPlugin):
     engine_class = None
     #: the SearchForm subclass to use
     search_form = SearchForm
+    category = 'search'
 
     def init(self):
         super(SearchPluginBase, self).init()
diff --git a/search/indico_search/plugin.py b/search/indico_search/plugin.py
index be2d095..9124aca 100644
--- a/search/indico_search/plugin.py
+++ b/search/indico_search/plugin.py
@@ -31,6 +31,7 @@ class SearchPlugin(IndicoPlugin):
     Provides a base for search engine plugins.
     """
 
+    category = 'search'
     hidden = True
     _engine_plugin = None  # the search engine plugin