Quizzler
A collection of trivia quizzes on a variety of topics for you to play online. Optimized for the iPhone. A separate desktop application is available to build your own custom interactive quizzes for the iPhone.

iPhoneWx
iPhoneWx is a companion web app that displays detailed US weather info and maps on an iPhone, taking settings from the full featured “Wx” weather app on Mac OS X.

WorldClockr
World Clockr provides a collection of digital world clocks. Each clock is customized to a location and time zone. This way it can show accurate sunrise and sunset times and reflect the current sun position on it’s animated background.

Ovulation Calendar Turn your iPhone into a baby maker.
Computes your monthly ovulation cycle. You can use it to avoid or to get pregnant, also useful for selecting your baby’s gender.

Resistor Value Calculator
Calculates the value of a resistor by simply inputting the band colors.

iPhone Rock Lighter
Turn your iPhone into a virtual lighter for use at the next rock concert you attend

Hunt’s Photo & Video
Search for photo and video equiptment on your iPhone