Since I wrote about reduced-functionality writing programs, and the benefits of a text tool with few or no bells and whistles, new ones have been popping up like spring lilies on Apple's App Store. With prices ranging from free to $25 or more, they've become a really interesting genre of writing tools. Of course, they are not without their drawbacks -- no printing, saving only as plaintext, etc. They were all about nothing but providing a "clean piece of paper" approach to writing. Until now, that is. Yesterday, Byword appeared on the App Store's "New and Noteworthy" page. It's a functional "step up" from OmmWriter and Writeroom, maintaining the "plain piece of paper" interface, while allowing on-the-fly choices for rich text or plain text, printing, minimal formatting and saving to PDF. Nice. And exceptionally affordable, at $4.99 ($3.99 for the rest of today).