Google Mobile App
This is similar to Firefox 3's "Awesome Bar" for the iPhone. Not only does this search-bar-on-steroids suggest popular query matches for you once you type in a few letters, but it'll also search your phone for any contact names that start with the same few letters. Tapping a search result launches it in a browser window, and tapping a contact name lets you message or call them. The program’s Search with My Location feature taps into the iPhone’s ability to detect your location in order to help you find businesses near you. Easy to use, and backed by Google's tried-and-tested search quality, this is definitely the first thing you need to have on your iPhone.
This is the best application for taking, storing or reviewing notes. You can take notes either by typing them, taking a photo or recording your voice. The best thing about it is the web component which allows you to synchronize your notes and access them from where ever you happen to be. You can use Evernote for lists (to-do, shopping, etc), expense tracking, and more. Check more detials on their website.
Pandora's Music App
Thanks to the iPhone version of Pandora's free music Web site, you may never need to use the iTunes Music Store again...just as long as you like your music to play randomly. Just enter an artist's name, press the Create button, and listen as your selected artist and similar-sounding acts play in no particular order. If you already have a Pandora account, the Pandora iPhone app lets you access your preexisting stations and even sends your listening data to your Facebook profile automatically. One fun use for this app: Put your iPhone on your bedside table and have it play your custom stations through the phone's on-board speakers--it sounds like a clock radio playing all your favorite acts. Surprisingly, this music-streaming app works without a hitch even at EDGE speeds.
Truveo Video Search
Trying to find cool videos to watch on your iPhone? Truveo Video Search lets you find videos from a variety of sites. You can play highest ranked or most popular videos and you can customize the interface with your favorite categories. You can also share videos via email.
This is a location-aware social network that will help you connect with your friends while on the go. You can also use Loopt to discover and explore nearby places and events recommended by your friends and other popular services like Yelp. its good to know that their service is entirely opt-in, and only approved users can track your whereabouts. More for young teenagers, but then, they are the biggest clientele for the new iPhone too, right?!
The free Remote app lets you control your iTunes library or on-screen Apple TV action directly with your iPhone via a Wi-Fi connection. Once your iPhone establishes a Wi-Fi connection, you simply select your iPhone from iTunes' 'Devices' list, enter the four-digit passcode on your iPhone's screen, and use it as a touch-screen clicker. It worked seamlessly in my tests with iTunes.
NYTimes & Mobile News
If you are a news-junkie, and would love to remain in touch with what's happening around the world, you need to get the NY Times and Mobile News ; between these two apps, all your daily dose of news fetching and sharing is covered! NY Times has content from the New York Times, classified into a number of sections, including Latest News, Business, Opinion, and a Photos section where clicking on an image will take you to a story associated with that image. Stories can be read in either portrait or landscape mode, and the summary page for each category shows headlines, a small portion of the article, and a photo. Mobile News gives you the ability to set up a number of locations for local news. By default, it will set up your current location as one of your locations, and you can easily add others, read saved stories later, or flip between multiple locations. At the bottom of each news story, there are four buttons—you can SMS or email the story to a friend, actually send in a report on a story if you have personal experience to add, and a button to save the story.
If you are an avid reader who likes reading on the phone-screen, this is a must have app for someone like you. Even if that's not something you do often, you could read something while commuting in a public transportation or waiting in some queue. I often wonder why Apple did not pre-load a similar eReader app itself? maybe there' room for iPhone-3!!:) Anyways, for the time being, the eReader app, courtesy of FictionWise, is going to be available for free at the iPhone app store.
If you are a sports-freak like my husband and need to be up-to-date with the latest buzz, SportsTap is totally for you. Be it MLB, NFL, NBA, international soccer, NHL, car racing, NCAA, PGA, tennis, or anything else, SportsTap covers them all--it's a nice free app that will put these at your fingertips. The interface is clean and intuitive, and the scores load fast, even on EDGE. SportsTap doesn't allow you to select a favorite team or teams to keep an eye on, but even so, the score you're looking for is always a couple of taps away.
This is not an absolute necessity, but these days, the Global Warming is making it very difficult to predict weather based on seasons! So the WeatherBug can help you get satellite weather maps, current radar, detailed forecasts, weather cameras, and severe weather alerts. You can get weather from 45,000 locations all over the world. A weather junkie's dream, if not yours!
The iPhone is not longer a phone; its a device that replaces your mobile phone and your laptop. With hordes of free applications to choose from, it can be hard to decide what you wan the most. Hope this list helps you find a beginning, and do share with us more iPhone apps via your comments!