Sonic Vox is a voice modulation application from SonicMule. It comes with five different options for voices, with the possibility of varying the options themselves by sliding the finger to the right or to the left.
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.
Note2Self is an audio recorder perfect for recording quick audio notes for yourself or recording lectures, etc. The trick with this app is its use of the accelerometer to start recording when you bring it up to your face. Recording can also be triggered manually or by shaking.
Measures is a unit conversion application, but don't let that fact fool you. This is one of the most comprehensive conversion apps we've seen. It has tons of categories and just about every conversion type you can think of and its currency conversions are updated daily. To top it off, it's actually easy to use.
Jaadu VNC is an application that lets you remotely control any Mac or PC running a VNC server. In addition to having control over the keyboard and mouse, you can actually see the the remote computer's screen for total control from wherever you are. Jaadu VNC makes use of the iPhone's touch screen for a unique and extremely effective implementation of the classic VNC client.
Simply put, FileMagnet is an application which allows you to store miscellaneous files on your iPhone. Because the iPhone doesn't provide any type of "disk mode" like most iPods, the application stores files within the apps personal storage space. FileMagnet requires a WiFi connection to wirelessly transfer files to and from your phone. Additionally, to access the files, the component FileMagnet desktop app is required, which is a free download.