Earlier this week, Serenity Caldwell took a first look at the new and concluded that while it's promising, it's still in need of a "serious upgrade." We also brought you news of , a suite of 30 iOS-enabled productivity applications, as well as Dan Moren's first look at the Microsoft-inspired app, which Dan says is "hit-or-miss."

Also new this week, a pair of reference apps designed for both the iPhone and iPad. is a guide to every Apple Macintosh computer ever made; its version 2.0 now takes advantage of the new iPad's Retina display. is a detailed anatomical tour of, well, your . Zombie iPad users will love it!

Other new and updated apps that caught our eye this week:

: Sure, it's only been about a month since we told you about the launch of SmugMug's free photography app. But this week's upgrade offers three new features that deserve mention. First and foremost, the app now features integration, letting users upload their edited pictures directly to the popular photo-sharing service. Second, Camera Awesome now offers in-app tutorials--useful, given the complexity of its photo-editing tools. And third, in-app purchases of effects packages have been lowered to a dollar apiece. What's the word for all of that? Awesome.

: We at have been quite open about our love of Marco Arment's $5 app. One of the things we love is his continuous improvement of what started out as a pretty great application for saving online articles for later reading. That pattern continues with this week's launch of Version 4.1.1. Among the highlights: You can now choose whether to view your collection of articles in either the new grid or the old list format. The pagination feature has been upgraded, with a "subtle" animation that makes it easier to tell if you've swiped forward or backward in the article you're reading. And the app's "dark mode" includes several upgrades, including the automatic dimming of pictures in an article, so you're not surprised by a blast of light in the dark--tap the photo and it will brighten, if you choose. Instapaper just keeps on getting better.