With more than 350000 apps and counting, the iPhone app store is really huge. It has turned into a billion-dollar industry in only a few short years, and with new apps coming up every other day, it's quite apparent that app exposure is of critical importance today.

Here is a compiled list of 10 latest iPhone apps that can be downloaded free of cost.

Leafsnap (Free, iTunes)

Updated: May 15, 2011

Developed by researchers from Columbia University, the University of Maryland, and the Smithsonian Institution, Leafsnap uses visual recognition software to help identify tree species from photographs of their leaves. Thanks to this app, you can easily you identify trees by taking a picture of their leaves. The app contains beautiful high-resolution images of leaves, flowers, fruit, petiole, seeds, and bark.

Voice Brief - Lite (Free, iTunes)

Released: May 17, 2011

If you are busy to sit down and read important news and updates, Vocie Brief - Lite will collect and read them all. With this virtual assistant app, you can listen to your schedule, news, Facebook, Twitter, Google Reader, stocks and more while you drive, eat, shave...whatever. The quality of voice is also of high quality.

Yahoo! Messenger (Free, iTunes)

Updated: May 18, 2011

The new Yahoo! Messenger app lets you do free video and voice calls, send free text messages to your friends whether they are on the iPad, mobile or PC. You can also share photos and videos with your Messenger contacts in real-time. This new IM app has been optimized for the iPad as well.

Trover (Free, iTunes)

Updated: Jun 03, 2011

Trover is a great local discovery app that lets you share discoveries with friends and fellow explorers in a fun, visual way. You can discover remarkable places and things nearby and post your discoveries by snapping a photo. Anyone can browse discoveries in Trover. Adding content to Trover requires Facebook log-in. Users can invite friends via Twitter also.

Do@ (Free, iTunes)

Updated: May 31, 2011

The aim behind Do@ is to revolutionize mobile search. This is kind of a universal search app that can find movies, music, TV, shopping, news, people, sports, cooking and other information from one interface. The user can type a short query like a movie title, a band or anything. The results will be mobile web-apps from the best publishers and app developers.

Sonar (Free, iTunes)

Updated: Jun 06, 2011

Sonar analyzes your Foursquare, Facebook, and Twitter networks and shows how you are connected to the people around you. For instance, when you walk into a room full of people and want to know if you have anything in common with anyone there, Sonar can be the way out for you. The app helps you discover and connect friends and friends of friends, Twitter friends and followers, business contacts and colleagues and so on.

Tracks (Free, iTunes)

Updated: Jun 01, 2011

This app is very useful in making photo stories with friends. You can make a track of your memorable moments and make any photo story you want to make with others. You can also invite your friends by email and they can add photos to your living album. After that tracks are auto-published to a secure web site for sharing.

Mixcloud (Free, iTunes)

Updated: 27 May 2011

An on-demand radio platform, Mixcloud allows you to stream your favourite radio shows, Podcasts and DJ Mix sets direct to your iPod or iPhone. However, the service is free for a limited period only.

ooVoo Mobile (Free, iTunes)

Updated: Jun 10, 2011

You can get ooVoo video chat for free on your iPhone 4, iPad or iPod touch. It features 6-way video chat. That means, you can make video calls to 5 friends. You can also send instant message and make voice calls to ooVoo contacts. Users can switch between their front and rear camera during the video call. Users can also call landline and mobile phone numbers using ooVoo credits.

Songkick (Free, iTunes)

Released: Jun 08, 2011

Using Songkick, you can track your favorite bands. It scans your music library and creates a personalized calendar based on your bands and your location. It alerts you when new concerts are announced. For every concert, you can see the line-up, venue map, all the ticket options, and invite friends.

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