Jan-Christoph Borchardt recently mentioned Zeta, a virtual keyboard for Android phones that is kind of similar to (but perhaps a bit less sophisticated than) Retype C. Zeta uses three large "buttons", each of which lets you select nine different keys using a gesture.

Zeta Layout

Alternative characters can be accessed by pressing and holding. To type a space or delete character, you do a swipe to the right or left, respectively. For return, you do a left-right-left swipe.

Zeta probably takes a bit of time to learn, but looks like a workable alternative for languages that don't support auto-correction.

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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.