Find my iPhone/iPad (Free) – If you misplace your iPhone, iPad, iPod touch, or Mac, the Find My iPhone app will let you use another iOS device to find it and protect your data. Simply install this free app on another iOS device, open it, and sign in with your Apple ID. Find My iPhone will help you locate your missing device on a map.You can then choose to display a message or play a sound, remotely lock your device, or erase your data on it.
Flashlight(Free)- uses the LED light on iPhone 4 and fills your screen with bright white light to illuminate your world when you find yourself in a dark spot or concert. Includes fully customizable special effects including: Magnifying Lens, Fireworks, Strobe Light, Trippy
Google Mobile App (Free) – It enable users to search Google quickly using voice, pictures (Google Goggles), and location. It also links to Google’s other applications so that users can easily navigate to them.
iScholarReader (Free) – iScholarReader is a specialized document reader for research papers using Google Scholars. It enables users to search, bookmark, and download papers on their iPhones.
iBooks (Free) – It allows users to download and read books. Therefore it is also considered as Apple’s ebook store and ebook reader. It can also save PDF files for you to read later. Great for Musicians.
i-nigma (4) QR datamatrix barcode reader (Free) – i-nigma can be used to scan both 1-dimensional EAN codes and 2-dimentional barcodes (datamatrix and QR codes) off printed material. This version only supports iPhone 4 or iPhone iOS4 devices. For older OS versions, please download the original i-nigma.
Kindle(Free) – Read books, magazines, and newspapers right on your iPhone without ever buying an e-reader. From within the Kindle app, you can buy or download for free hundreds of thousands of books, and more than 100 different newspapers and magazines.