Steven Troughton-Smith's Orbit is an actual implementation of Ocean Observations’ Springboard Exposé for the iPhone. For obvious reasons it's only available in the Cydia store1 and not in the official iPhone App Store, but if you have a jailbroken iPhone, it's something you might want to check out.

Steven is already working on version 2.0. If you want to keep up with what he's doing, it's probably best to follow him on Twitter.

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designed for use cover

But wait, there's more!

Want to read more like this? Buy my book's second edition! Designed for Use: Create Usable Interfaces for Applications and the Web is now available DRM-free directly from The Pragmatic Programmers. Or you can get it on Amazon, where it's also available in Chinese and Japanese.