RulerPhone is a fascinating concept. The premise is that you set a credit card sized object next to anything that you would like to measure and the application allows you to find semi-precise measurements by comparing sizes.
RPSOnline is a Rock Paper Scissors application that allows you to challenge players over the internet in this classic game of statistics and chance. Based upon the results of each game that you accrue over time, your scores are logged in the database and you can achieve rankings on the main boards.
Byline is an RSS reader that syncs with Google Reader. The UI is extremely beautiful and intuitive. Folders and notes are fully supported and it caches teasers, images, and even entire web pages.
Tetravex is a gaming application that is somewhat like Triominos or any other organization-skill game that you can think of. It provides you with a bracket of blocks with four colored sides, and your task is to reorganize them onto the square above.
Torus is a simple game which revolves around catching falling tori (rings) from the sky before they hit the floor. You catch tori with a hook which is controlled by tilting your iPhone in the direction you want the hook to move. Each torus represents a different score and speed of travel. When you're running low on health, catching a green torus heals you.
FTP On The Go is an application which allows you to access FTP servers wherever you are. To log into a server, simply type the address, user name and password. FTP On The Go will connect to both secure and non-secure FTP servers over a WiFi or a cellular network. Once logged in, you can edit files, upload photos, and create directories. The idea is that FTP On The Go will serve as a quick way to fix something on your web server wherever you are.
Pianist is a virtual piano that allows you to play a keyboard, compose music, and record and edit your compositions. It has a full scrolling keyboard with all 88 keys, virtual sustain and soft pedals and a metronome. One octave is displayed at a time, while scrolling to other octaves is accessible through a highlighted smaller keyboard at the top of the screen.
When most people think of "Pong", they think of the lo-tech, 2 dimensional arcade game by Atari from 1972. 3-D Vector Pong by Gyrocade is essentially the same game, but with a very modern, 3-D twist, adapted to the sophisticated technology of the iPhone and iPod touch.