Here is the  list of the top 10 free android application that one must install on any Android smartphone.

Surprised why is this application at priority one. I don’t know what other thinks but according to me it’s the most important application for an Android device. Using it you can scan the QR code of any application on Appbrain or on any other website and get the download link instantly. Also you can share your contacts, apps, and bookmarks via QR Code.

Security is the one of the prime concern, be it  anything and lookout is the best in its class. It has got a Antivirus & Security feature to protect your phone from any viruses, a Find My Phone module to track down your lost or stolen phone and finally  Backup and Restore module to take backup of all your valuable data on your Android device so you don’t have panic lines on your forehead even if your device is wiped out by chance.

Android OS has multitasking support and thus you can run parallel application back to back. Some times this boon rather changes into curse when you have many parallel task running side by side munching on your RAM. The above mentioned tool kills your running application with a single click. You can either kill all the application by a single click or select them prior of dumping.

Although Android comes preloaded with a default file manager but believe me that is not enough. Now when you have ASTRO installed on your device you will have features like File Manager, Backup, Image and text viewers, Networking, SMB, Bluetooth, SFTP, Zip Tar, downloader, thumbnails, search files, application manager and task manager  in a single application.

Opera Mobile web browser is one of the best web browser for Android and will make your browsing easy, interactive and fun. One of the best feature of Opera is its  Turbo mode that  help us to save on data costs.

Pulse is the best and at the same time beautiful news reader for Android device. Pulse takes your favorite news websites and blogs and transforms them into a colorful and interactive mosaic. If you like a story you can even Share it with your friends  via Facebook, Twitter and Email with just a click.

Probably this is one of the only Google application that does not come preinstalled on an Android. Using Google you can search almost any thing on internet by just clicking the picture of the stuff. Goggles uses image recognition technology to recognize objects and return relevant search results. the latest version also solves Sudoku with in no time.

No doubt the default video player of Android is a decent application but it has very less file type support. Using arcMedia player you can easily play avi, divx, mkv, mov, mp4, rmvb, wmv, vob, xvid video  easily.

We love to chat with our family and frends any where and every where and eBuddy takes full care of it. Using it you can always stay connected with all your friends and family on MSN (Windows Live Messenger or WLM), Facebook, Yahoo!, MySpace, Gtalk (Orkut), ICQ, AIM (AOL) and Hyves.

Zedge is home of millions of free, unique and rare ringtones, notification sounds & wallpapers shared by 19 million Zedgers. Using it you can fancy your mobile with a new ringtone or wallpaper every day.

Well this list is not the end but its just the beginning to the extremely wonderful world of Android applications. If you want more you can visit AppBrain instantly and start downloading what suits you the best.