Finish the last sections

doc/topics/development/modules/developing.rst

@@ -93,6 +93,8 @@ __func_alias__
 __outputter__
 -------------
 
+.. _dunder-dictionaries:
+
 Dunder Dictionaries
 ===================
 

doc/topics/development/modules/index.rst

@@ -172,7 +172,7 @@ Beacon
 * :ref:`Writing Beacons <writing-beacons>`
 
 Beacons are polled by the Salt event loop to monitor non-salt processes. See 
-:ref`Beacons <beacons>` for more information about the beacon system.
+:ref:`Beacons <beacons>` for more information about the beacon system.
 
 Cache
 -----
@@ -346,15 +346,27 @@ function properly.
 SPM pkgdb
 ---------
 
+* :ref:`SPM Development Guide: Package Database <spm-development-pkgdb>`
+
+pkgdb modules provides storage backends to the package database.
+
 SPM pkgfiles
 ------------
 
+* :ref:`SPM Development Guide: Package Database <spm-development-pkgfiles>`
+
+pkgfiles modules handle the actual installation.
+
 SSH Wrapper
 -----------
 
+Replacement execution modules for :ref:`Salt SSH <salt-ssh>`.
+
 Thorium
 -------
 
+Modules for use in the :ref:`Thorium <thorium-reactor>` event reactor.
+
 Tops
 ----
 
@@ -364,6 +376,9 @@ the state system.
 Util
 ----
 
+Just utility modules to use with other modules via ``__utils__`` (see 
+:ref:`Dunder Dictionaries <dunder-dictionaries>`).
+
 Wheel
 -----
 

doc/topics/spm/dev.rst

@@ -20,6 +20,7 @@ marked as required are crucial to SPM's core functionality, while arguments that
 are marked as optional are provided as a benefit to the module, if it needs to
 use them.
 
+.. _spm-development-pkgdb:
 
 Package Database
 ----------------
@@ -146,6 +147,8 @@ The only argument that is expected is ``db_``, which is the package database
 file.
 
 
+.. _spm-development-pkgfiles:
+
 Package Files
 -------------
 By default, package files are installed using the ``local`` module. This module