Every now and then you see something amazing, especially within mobile software business. Applications, which make hardware do something it wasn't supposed to do. UIs, which do old things in new ways or new things in old ways. Designs which are oh so obvious - after you've seen them.
Convertbot (for iPhone) by Tapbots is a festival of design, party of usability, dripping sex appeal all over the place. Maybe putting form over function, but that form alone is something I'd be delighted to use regardless of what the function might be. This is an application I want to be seen using.
Make yourself a favour and check out their video. You will be glad you did. Not only the application is awe-inspiring, but also their marketing: the quiet guitar music, reassuring metallic sound effects, confident presenter voice - and the application itself. You really have to see how touch UI applications work, screenshots just can't deliver the experience.
Thanx to Gizmondo for their inspiring "ConvertBot is the Prettiest Unit Conversion iPhone App You're Likely To See" article.