Once upon a time, Mundocani created Outfitter, and it was good, and lots of people used it, and there was general rejoicing. Then Blizzard released their new addon policy, prohibiting selling addons and asking for donations in-game, and many addon writers thought that was not so good. Mundocani pulled his addons from public distribution in protest, as did some other authors. This was sad, even if I did seize the moment to write about some other mods that did the job.
Now it has been brought to my attention (thanks, nadewow) that Mundocani is both continuing development on Outfitter and returning it to public distribution (i.e. Curse and WoW Interface). His stated reasoning for this latest move is that "Blizzard isn't going to respond to the concerns raised by the community, which puts things at a stalemate," and he doesn't want to punish users for what he sees as Blizzard's mistakes.
In short: Outfitter is coming back (this goes for GroupCalendar too, by the way). Yay! That news is especially welcome because we won't be seeing the Blizzard Equipment Manager in 3.1 as we had expected to. While we wait for them to be posted back to the addon sites, you can get a copy of either mod at the author's forums (registration required).