diff --git includes/module.inc includes/module.inc
index 1bef638..b3ad0e6 100644
--- includes/module.inc
+++ includes/module.inc
@@ -76,7 +76,58 @@ function module_list($refresh = FALSE, $sort = FALSE, $fixed_list = NULL) {
 }
 
 /**
- * Find dependencies any level deep and fill in required by information too.
+ * Defines the available relationships.
+ *
+ * @return
+ *   An associative array whose keys are available relationships and whose
+ *   values are the keys for the built relationships.
+ */
+function _module_get_available_relationships() {
+  $relationships['dependencies'] = array(
+    'relation_by' => array(
+      'property' => 'required_by',
+      'name' => t('Required by'),
+    ),
+    'relation' => array(
+      'property' => 'requires',
+      'name' => t('Requires'),
+    ),
+  );
+  $relationships['recommends'] = array(
+    'relation_by' => array(
+      'property' => 'recommended_by',
+      'name' => t('Recommended by'),
+    ),
+    'relation' => array(
+      'property' => 'recommends',
+      'name' => t('Recommends'),
+    ),
+  );
+  $relationships['supports'] = array(
+    'relation_by' => array(
+      'property' => 'supported_by',
+      'name' => t('Supported by'),
+    ),
+    'relation' => array(
+      'property' => 'supports',
+      'name' => t('Supports'),
+    ),
+  );
+  $relationships['enhances'] = array(
+    'relation_by' => array(
+      'property' => 'enhanced_by',
+      'name' => t('Enhanced by'),
+    ),
+    'relation' => array(
+      'property' => 'enhances',
+      'name' => t('Enhances'),
+    ),
+  );
+  return $relationships;
+}
+
+/**
+ * Find relationships any level deep and fill in required by information too.
  *
  * @param $files
  *   The array of filesystem objects used to rebuild the cache.
@@ -89,22 +140,29 @@ function module_list($refresh = FALSE, $sort = FALSE, $fixed_list = NULL) {
  */
 function _module_build_dependencies($files) {
   require_once DRUPAL_ROOT . '/includes/graph.inc';
-  $roots = $files;
-  foreach ($files as $filename => $file) {
-    $graph[$file->name]['edges'] = array();
-    if (isset($file->info['dependencies']) && is_array($file->info['dependencies'])) {
-      foreach ($file->info['dependencies'] as $dependency_name) {
-        $graph[$file->name]['edges'][$dependency_name] = 1;
-        unset($roots[$dependency_name]);
+
+  $relationships = _module_get_available_relationships();
+
+  foreach ($relationships as $relationship => $properties) {
+    $graph = array();
+    $roots = $files;
+    foreach ($files as $filename => $file) {
+      $graph[$file->name]['edges'] = array();
+      if (isset($file->info[$relationship]) && is_array($file->info[$relationship])) {
+        foreach ($file->info[$relationship] as $dependency_name) {
+          $graph[$file->name]['edges'][$dependency_name] = 1;
+          unset($roots[$dependency_name]);
+        }
       }
     }
+    drupal_depth_first_search($graph, array_keys($roots));
+    foreach ($graph as $module => $data) {
+      $files[$module]->{$properties['relation_by']['property']} = isset($data['reverse_paths']) ? $data['reverse_paths'] : array();
+      $files[$module]->{$properties['relation']['property']} = isset($data['paths']) ? $data['paths'] : array();
+      $files[$module]->sort = $data['weight'];
+    }
   }
-  drupal_depth_first_search($graph, array_keys($roots));
-  foreach ($graph as $module => $data) {
-    $files[$module]->required_by = isset($data['reverse_paths']) ? $data['reverse_paths'] : array();
-    $files[$module]->requires = isset($data['paths']) ? $data['paths'] : array();
-    $files[$module]->sort = $data['weight'];
-  }
+
   return $files;
 }
 
diff --git modules/system/system.admin.inc modules/system/system.admin.inc
index bed9487..1e7dad0 100644
--- modules/system/system.admin.inc
+++ modules/system/system.admin.inc
@@ -581,6 +581,7 @@ function system_modules($form_state = array()) {
   cache_clear_all('schema', 'cache');
   // Get current list of modules.
   $files = system_get_module_data();
+  $relationships = _module_get_available_relationships();
 
   // Remove hidden modules from display list.
   foreach ($files as $filename => $file) {
@@ -609,17 +610,19 @@ function system_modules($form_state = array()) {
   foreach ($files as $filename => $module) {
     $extra = array();
     $extra['enabled'] = (bool) $module->status;
-    // If this module requires other modules, add them to the array.
-    foreach ($module->requires as $requires => $v) {
-      if (!isset($files[$requires])) {
-        $extra['requires'][$requires] = t('@module (<span class="admin-missing">missing</span>)', array('@module' => drupal_ucfirst($requires)));
-          $extra['disabled'] = TRUE;
-        }
-      elseif (!$files[$requires]->status) {
-        $extra['requires'][$requires] = t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $files[$requires]->info['name']));
+    // If this module has a relation to other modules, add them to the array.
+    foreach ($relationships as $properties) {
+      foreach ($module->{$properties['relation']['property']} as $relation => $v) {
+        if (!isset($files[$relation])) {
+          $extra[$properties['relation']['property']][$relation] = t('@module (<span class="admin-missing">missing</span>)', array('@module' => drupal_ucfirst($relation)));
+            $extra['disabled'] = TRUE;
+          }
+        elseif (!$files[$relation]->status) {
+          $extra[$properties['relation']['property']][$relation] = t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $files[$relation]->info['name']));
+          }
+          else {
+          $extra[$properties['relation']['property']][$relation] = t('@module (<span class="admin-enabled">enabled</span>)', array('@module' => $files[$relation]->info['name']));
         }
-        else {
-        $extra['requires'][$requires] = t('@module (<span class="admin-enabled">enabled</span>)', array('@module' => $files[$requires]->info['name']));
       }
     }
     // Generate link for module's help page, if there is one.
@@ -629,19 +632,21 @@ function system_modules($form_state = array()) {
         $extra['help'] = theme('more_help_link', url("admin/help/$filename"));
       }
     }
-    // Mark dependents disabled so the user cannot remove required modules.
-    $dependents = array();
-    // If this module is required by other modules, list those, and then make it
-    // impossible to disable this one.
-    foreach ($module->required_by as $required_by => $v) {
-      // Hidden modules are unset already.
-      if (isset($files[$required_by])) {
-        if ($files[$required_by]->status == 1) {
-          $extra['required_by'][] = t('@module (<span class="admin-enabled">enabled</span>)', array('@module' => $files[$required_by]->info['name']));
-          $extra['disabled'] = TRUE;
-        }
-        else {
-          $extra['required_by'][] = t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $files[$required_by]->info['name']));
+    // If this module has a relationship to other modules, list those, and then make it
+    // impossible to disable this one if required.
+    foreach ($relationships as $relationship => $properties) {
+      foreach ($module->{$properties['relation_by']['property']} as $relation => $v) {
+        // Hidden modules are unset already.
+        if (isset($files[$relation])) {
+          if ($files[$relation]->status == 1) {
+            $extra[$properties['relation_by']['property']][] = t('@module (<span class="admin-enabled">enabled</span>)', array('@module' => $files[$relation]->info['name']));
+            if ($relationship === 'dependencies') {
+              $extra['disabled'] = TRUE;
+            }
+          }
+          else {
+            $extra[$properties['relation_by']['property']][] = t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $files[$relation]->info['name']));
+          }
         }
       }
     }
@@ -683,14 +688,19 @@ function system_sort_modules_by_info_name($a, $b) {
  * Build a table row for the system modules page.
  */
 function _system_modules_build_row($info, $extra) {
+  $relationships = _module_get_available_relationships();
+
   // Add in the defaults.
-  $extra += array(
-    'requires' => array(),
-    'required_by' => array(),
+  $default = array(
     'disabled' => FALSE,
     'enabled' => FALSE,
     'help' => '',
   );
+  foreach ($relationships as $properties) {
+    $default[$properties['relation_by']['property']] = array();
+    $default[$properties['relation']['property']] = array();
+  }
+  $extra += $default;
   $form = array(
     '#tree' => TRUE,
   );
@@ -704,8 +714,28 @@ function _system_modules_build_row($info, $extra) {
   $form['version'] = array(
     '#markup' => $info['version'],
   );
-  $form['#requires'] = $extra['requires'];
-  $form['#required_by'] = $extra['required_by'];
+
+  $form['#relationships'] = array();
+  $form['#requires'] = array();
+  foreach ($relationships as $relationship => $properties) {
+    if (!empty($extra[$properties['relation']['property']])){
+      $form['#relationships'][] = array(
+        'name' => $properties['relation']['name'],
+        'values' => $extra[$properties['relation']['property']],
+        'relationship' => $relationship,
+      );
+      if ($relationship === 'dependencies') {
+        $form['#requires'] = $extra[$properties['relation']['property']];
+      }
+    }
+    if (!empty($extra[$properties['relation_by']['property']])){
+      $form['#relationships'][] = array(
+        'name' => $properties['relation_by']['name'],
+        'values' => $extra[$properties['relation_by']['property']],
+        'relationship' => $relationship,
+      );
+    }
+  }
 
   // Check the compatibilities.
   $compatible = TRUE;
@@ -2072,11 +2102,10 @@ function theme_system_modules_fieldset($form) {
     }
     // Add the description, along with any modules it requires.
     $description .= drupal_render($module['description']);
-    if ($module['#requires']) {
-      $description .= '<div class="admin-requirements">' . t('Requires: !module-list', array('!module-list' => implode(', ', $module['#requires']))) . '</div>';
-    }
-    if ($module['#required_by']) {
-      $description .= '<div class="admin-requirements">' . t('Required by: !module-list', array('!module-list' => implode(', ', $module['#required_by']))) . '</div>';
+    if ($module['#relationships']) {
+      foreach ($module['#relationships'] as $relationship) {
+        $description .= '<div class="admin-requirements">' . $relationship['name'] . ': ' . implode(', ', $relationship['values']) . '</div>';
+      }
     }
     $row[] = array('data' => $description, 'class' => 'description');
     $rows[] = $row;
diff --git modules/system/system.module modules/system/system.module
index 9a8ecaf..66a1c8d 100644
--- modules/system/system.module
+++ modules/system/system.module
@@ -1261,7 +1261,9 @@ function _system_get_module_data() {
   // Set defaults for module info.
   $defaults = array(
     'dependencies' => array(),
-    'dependents' => array(),
+    'recommends' => array(),
+    'supports' => array(),
+    'enhances' => array(),
     'description' => '',
     'package' => 'Other',
     'version' => NULL,