Useful AddOns
A selection of useful AddOns you might want to take a look at!
!WowAceUpdater
Most AddOns I use are Ace so it is very comfortable to just use this tool to install them and keep them up to date.
Auctioneer
This plugin provides you with in-game data on data that is collated by you at the auction house. It gives you a method to identify the bargains at the auction house by identifying price trends and then finding items that will buyout or bidout for less than the trend data suggests should be it's correct price. This plugin also provides you with a database of vendor buy and sell prices, what professions will use the item and stack sizes for a relativly large set of common in-game items.
Grid
Grid is a modular, lightweight and screen-estate saving grid of party/raid unit frames based on Ace2 and various embedded libraries provided by the Ace-community.