This addon, Spellcraft, does a variety of things for the Mage Class.
All of which you can configure yourself using /spellcraft or /sc.

This addon is entirely modularized. This means that you pick the features
that you want, the rest do NOT stay in memory (i.e. the addon is only as big
as you want it to be). You can pick the modules you want using /spellcraft
when you are logged in. Additionally if you would like, you can
permenantly remove the modules yourself; they are all in this folder following
the naming convention: "Spellcraft.[Module].lua".

Below are some of the features you have availible to you:

--You can have this addon automatically equip your weapons/wand with the best
  intelligence when you evocate. It will reequip your previous weapons when you
  finish. As of WoW patch 2.4.3, you must use "/evocate" in a macro before
  you cast Evocate for your Intellect weapons to equip.

--You can buy reagents (up to a certain number you can set with
  "/changereagent"), sell your gray items, and repair all your items. Will
  tell you when you need to purchase more reagents upon entering a city.

--You can use the slash command: "/bandagem" to messages healers in your
  group/raid that are targetting you that you are bandaging yourself. It also
  notifies your party. This can also be done automatically.

--Automatically Releases you from a BG.

--Makes a Minimap Button only for mages that, when clicked, will open a frame
  with all the portals your level permits you to cast, along with your
  hearthstone.

--The addon will give you a prompt to remove all your armor when you use
  invisibility while in a group and leaving combat. It will then provide
  a prompt to put all your gear back on.

--You can set up this addon to automatically whisper people that are targetting
  your sheep, message your party, and message your raid. You can also use the
  slash command: "/polym [f,t]". If you use this, TURN OFF automatic messaging.
  For example: "/polym f" where f means your sheep is your focus, or use
  "/polym t" where t means your sheep is your target. It messages people in
  your group/raid/battlegroup ONCE that they are targeting your "focus" or
  "target" and that you are polymorphing their target. Additionally, it has a
  configurable set probable chance to say polymorph phrases when in a party or
  raid, depending on your settings. These things you can configure with
  "/polym config".

--Tells you who broke your sheep and with what attack/spell.

--This addon automatically collects garbage (recycles unused memory) of all
  addons when you die or enter a place of rest. This helps minimize
  computer lag (not netowrk lag!). Other conditionals for this may be added
  in the future.

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SLASH COMMAND LIST
======================
/spellcraft -- Configure this addon.
/bandagem -- Messages healers in your group that are targeting you, that you
             are bandaging yourself. Also notifies party.
/polym [config,f,t]-- Messages people in your party/raid/battlegroup that you
                      are polymorphing their target. Messages your party as
                      well, if you are >just< in a party.
/getnaked -- Takes off all your gear with durability.
/gearoff -- Same as /getnaked.
/gearon -- Puts your gear (that you took off with /getnaked) back on.
/changereagent -- Opens a window to change the maximum number of each of your
                  class' reagent to buy.
/evocate -- Put in your macros before you cast evocate. Added in 1.116 due
            to patch 2.4.3