This is a great free program.
This is a great, free, program which will allow you to manage addons, and downloads for some of your games. I use is for RoM (Runes of magic), and it is so easy to use. Just brows the addons you want, install, and go. It will even update them for you. Very nice!
Software complicated i suggest Bigpond Game Arena. It is easier to use and its unmetered for bigpond customers.