This simple unit conversion calculator lets you specify your most common conversion "modes" in the main menu for quick access. Units supports most common conversions. Currency conversion rates are updated daily from the developer's server.
I have always loved fancy watches like Rolex and Omega. I can remember days of walking through the mall just staring at the watch display in the jewelry store (back when I actually got to visit my own stores). The problem was, while it was always free to look, taking home one of those fancy watches always cost thousands of dollars. And I have never found myself at a point where that would make sense. Maybe someday. But in the meantime, my lust for watches can now be fed, through the magic of the iPhone and Emerald Chronometer.
In the Chicago Tribune giveaway daily, Redeye, Chicago-based iPhone App developers speak about their successes. Lars Bergstrom, for instance, is a PhD candidate at the University of Chicago, but came away with $100,000 or so for coming up with the WiFi Finder app.
Recently, eWeek posted a handy round-up of 10 iPhone IT administration utilities. As it happens, I have to do a fair amount of sys admin work and was looking for just such a list. Only 2 of these apps are gratis (an SSH terminal app and flashlight), but most of them are under 10 bucks.