Index: Lib/pydoc.py
===================================================================
--- Lib/pydoc.py	(revision 59634)
+++ Lib/pydoc.py	(working copy)
@@ -1064,6 +1064,14 @@
             result = result + self.section(
                 'PACKAGE CONTENTS', join(modpkgs, '\n'))
 
+        submodules = []
+        for key, value in inspect.getmembers(object, inspect.ismodule):
+            submodules.append(key)
+        if submodules:
+            submodules.sort()
+            result = result + self.section(
+                'SUBMODULES', join(submodules, '\n'))
+
         if classes:
             classlist = map(lambda (key, value): value, classes)
             contents = [self.formattree(