LiveView is a specialized remote screen viewing application intended as a tool to help designers create graphics for mobile applications, it has also proven to be useful for creating quick and dirty simulations, demos, and experience prototypes.
For visual designers — Develop pixel–perfect graphics for the iPhone quickly and easily with a live view of your canvas/artboard while you work.
For interaction designers — With your iPhone tethered via WiFi, you can interact with software prototypes and demos running on your Mac to communicate and iterate your concepts quickly.
For everyone — If …

Share your location securely with Voilà! on the web as well as your friends on Twitter, Faccebook, Brightkite, Plazes, Dipity, your own blog and lots of other services as well and via email too.
Voilà!  updates your current location on  Yahoo! Fire Eagle and Twitter profile. When you update your location on Fire Eagle, it become available on all the web services you linked with your Fire Eagle account.
Features

Voilà! automatically determine your current location with the iPhone and iPod touch GPS, Wi-Fi, and cell tower location technology
Your current address …