Added 3 additional sections to the Monitoring Tools section to migrate links from http://www.mongodb.org/display/DOCS/Monitoring+and+Diagnostics for several 3rd party tools: self hosted monitoring tools, hosted monitoring tools and other tools.

Author: davidmytton

source/administration/monitoring.txt

@@ -144,6 +144,49 @@ this includes a count of the objects in the collection, the size of
 the collection, the amount of disk space used by the collection, and
 information about the indexes.
 
+3rd Party Tools
+~~~~~~~~~~~~~~~
+
+There are a number of plugins and monitoring tools to help you monitor MongoDB. 
+
+Self Hosted Monitoring Tools
+````````````````````````````
+
+These are monitoring tools that you must install, configure and maintain
+on your own servers, usually open source.
+
+============================================================  =======================================================================================  ======================================
+ **Tool**                                                     **Plugin**                                                                                **Description**
+------------------------------------------------------------  ---------------------------------------------------------------------------------------  --------------------------------------
+ `Ganglia <http://sourceforge.net/apps/trac/ganglia/wiki>`_    `mongodb-ganglia <https://github.com/quiiver/mongodb-ganglia>`_                          Shell script to report operations per second, memory usage, btree statistics, master/slave status and current connections.
+ `Ganglia <http://sourceforge.net/apps/trac/ganglia/wiki>`_    `gmond_python_modules <https://github.com/ganglia/gmond_python_modules>`_                Parses output from the :dbcommand:`serverStatus` and :dbcommand:`replSetGetStatus` commands.
+ `Motop <https://github.com/tart/motop>`_                                                                                                               Realtime monitoring tool for several MongoDB servers. Shows current operations ordered by durations every second.
+ `mtop <https://github.com/beaufour/mtop>`_                                                                                                             A top like tool.          
+ `Munin <http://munin-monitoring.org/>`_                       `mongo-munin <https://github.com/erh/mongo-munin>`_                                      Retrieves server statistics.
+ `Munin <http://munin-monitoring.org/>`_                       `mongomon <https://github.com/pcdummy/mongomon>`_                                        Retrieves collection statistics (sizes, index sizes, and each (configured) collection count for one DB).
+ `Munin <http://munin-monitoring.org/>`_                       `munin-plugins Ubuntu PPA <https://launchpad.net/~chris-lea/+archive/munin-plugins>`_    Some additional munin plugins not in the main distribution. 
+ `Nagios <http://www.nagios.org/>`_                            `nagios-plugin-mongodb <https://github.com/mzupan/nagios-plugin-mongodb>`_               Monitors availability, resource utilization, health, performance and other important metrics.
+ `Zabbix <http://www.zabbix.com/>`_                            `mikoomi-mongodb <https://code.google.com/p/mikoomi/wiki/03>`_                           A simple Nagios check script.
+============================================================  =======================================================================================  ======================================
+
+Hosted (SaaS) Monitoring Tools
+``````````````````````````````
+
+These are monitoring tools provided as a hosted service, usually on a 
+subscription billing basis.
+
+==================================================  ===========
+ **Name**                                            **Notes**
+--------------------------------------------------  -----------
+ `Scout <http://scoutapp.com>`_                      Several plugins including: `MongoDB Monitoring <https://scoutapp.com/plugin_urls/391-mongodb-monitoring>`_, `MongoDB Slow Queries <http://scoutapp.com/plugin_urls/291-mongodb-slow-queries>`_ and `MongoDB Replica Set Monitoring <http://scoutapp.com/plugin_urls/2251-mongodb-replica-set-monitoring>`_.
+ `Server Density <http://www.serverdensity.com>`_    `Dashboard for MongoDB <http://www.serverdensity.com/mongodb-monitoring/>`_, MongoDB specific alerts, replication failover timeline and iPhone, iPad and Android mobile apps.
+==================================================  ===========
+
+Other Tools
+```````````
+
+- `dex <https://github.com/mongolab/dex>`_: Index and query analyzer for MongoDB: compares MongoDB log files and index entries to make index recommendations.
+
 Diagnosing Performance Issues
 -----------------------------