Addon Spotlight: Sage
As is my usual custom, I ran to my usual add-on site and tried the most popular packages. They were simply too much for me. The configuration was just too much. I'm a simple kind of guy, and just looking at the configuration screens made me dizzy. I wanted something lightweight and functional.
Then I found Sage. Sage doesn't show the pretty character portraits, but I really don't miss them that much. Sage displays the player, target, target of target, party, pet, and focus frames. Every one of them are completely scalable in size, individually and as a whole. Focus is a handy little tool that the game supports, but (as far as I know) the default UI still does not display. It allows you to monitor any player or mobs health persistently. So on those escort quests, the healer could focus the escort to monitor it's health all the time without having to constantly keep it targeted. Focus has a bazillion uses really, and Sage supports it fully.
Another thing I like about Sage is how visible Tuller has made the debuffs. It's really easy to see "who gets hit with what" and identify the "what" quickly. The debuff icons are large, and the health bar colour codes to the type of debuff, whether it's poison, disease, curse, etc.
Sage also supports range checking. I wish there was a way for it to check line-of-sight too, but this is still a great function. When you're healing a party and somebody steps out of your casting range, their information dims to indicate that you can't affect them through casting, so you can either move, or bitch at them on Vent. (I usually choose the latter.)
Although I would definitely call this a minimalist add-on from a graphic point of view, there are also a number of bar textures to choose from to suit your personal taste.
I couldn't live without Sage, at least on my shaman. I really hope it doesn't break when into unit frames in the upcoming patch!