Saw Zore's post about UICentral and that gave me the idea to link this program which I've used for some time.
It's called WoWus (WoWus - World of Warcraft Updating System) and what it does is updating your addons automatically. Unlike UICentral it doesn't only update from a single source, but from many different sources, thus giving you the most up-to-date version of your addons.
The current database have over 1700 addons.
It's very easy to use. Just start it once in a while before logging in to WoW and check for updates. The program downloads and installs updates automatically (when you tell it to do).
I found this program very useful to make it easier to update loads of addons after a patch or something, and much better than programs like the Curse client or UICentral since it doesn't only get updates from one single site so I wanted to share this with you .
More info+download at:
WoWus - World of Warcraft Updating System
Enjoy, hope it's useful.