diff --git plugins/context_reaction_block.inc plugins/context_reaction_block.inc
index 864f15b..3630060 100644
--- plugins/context_reaction_block.inc
+++ plugins/context_reaction_block.inc
@@ -39,14 +39,15 @@ class context_reaction_block extends context_reaction {
       '#suffix' => '</div>',
     );
     foreach ($this->get_blocks() as $block) {
-      if (!isset($form['selector'][$block->module])) {
-        $form['selector'][$block->module] = array(
+      $group = isset($block->context_group) ? $block->context_group : $block->module;
+      if (!isset($form['selector'][$group])) {
+        $form['selector'][$group] = array(
           '#type' => 'checkboxes',
-          '#title' => $modules[$block->module],
+          '#title' => isset($block->context_group) ? $block->context_group : $modules[$block->module],
           '#options' => array(),
         );
       }
-      $form['selector'][$block->module]['#options'][$block->bid] = check_plain($block->info);
+      $form['selector'][$group]['#options'][$block->bid] = check_plain($block->info);
     }
     ksort($form['selector']);
 
diff --git theme/context_reaction_block.theme.inc theme/context_reaction_block.theme.inc
index 97a2710..2728316 100644
--- theme/context_reaction_block.theme.inc
+++ theme/context_reaction_block.theme.inc
@@ -85,11 +85,13 @@ function template_preprocess_context_block_browser(&$vars) {
   $blocks = array();
   // Group blocks by module.
   foreach ($vars['blocks'] as $block) {
-    if (!isset($categories[$block->module])) {
+    $group = isset($block->context_group) ? $block->context_group : $block->module;
+    if (!isset($categories[$group])) {
       $info = system_get_info('module', $block->module);
-      $categories['#options'][$block->module] = !empty($info['name']) ? $info['name'] : $block->module;
+      $title = $group = isset($block->context_group) ? $block->context_group : (!empty($info['name']) ? $info['name'] : $block->module);
+      $categories['#options'][$group] = $title;
     }
-    $blocks[$block->module][$block->bid] = $block; // Don't call theme('context_block_browser_item') to allow others to alter.
+    $blocks[$group][$block->bid] = $block; // Don't call theme('context_block_browser_item') to allow others to alter.
   }
   $vars['categories'] = $categories; // Don't call theme('select') here to allow further preprocesses to alter the element.
   $vars['blocks'] = $blocks;