The Curse Client is the most advanced add-on manager that allows you to browse, install, and update your add-ons. It’s free, lightweight, and easy to use.
With the Curse Client you will be able to download, install or update any supported games’ add-ons with one click, easily track when your add-ons need to be updated, keep your Addons in sync across multiple computers. Moreover, you will never lose your add-on settings with Add-on Settings Backup.
The supported games are World of Warcraft, Warhammer Online, and Runes of Magic.