Samrat's Posterous

Here are few Apps which I think are very useful but not quite famous.
The Apps listed are all free.
To start with :

1)Files lite(iTunes Link)
    
  Files lite is a very useful App it supports viewing of many common file types, including most Microsoft Word, Excel and Powerpoint documents, PDF documents, images, text, html, movie and audio files. Documents and images are all displayed fullscreen, in portrait or landscape mode.
It's main limitation being a 200MB data storage limit.

2)Mover(iTunes Link)

 Mover is a lite and simple app to transfer files between your iPhones/iPod Touch. All you need to do is select the File or contact that you want to transfer and FLICK it towards the other device. Simple!      

3)ATM Hunter(iTunes Link)

  MasterCard has released ATM Hunter, an iPhone app that lets owners find nearby ATMs around the world by entering in an address or airport location. iPhone 3G owners don't even have to do that, because the app is location aware and can pick up your current address from the GPS radio.

4)Mobyko

 It is a very helpful App,it is generally a backup for you device,but i had some problem synchronizing it.Give it a try.

5)MultiConvert

 It is one of my favorite converter,it has over 800 units in over 40 categories. Use in either list mode or calculator mode available. Units can be updated at any time. Currency rates are updated every six hours from the European Central Bank.This is a must have App.

If you know some good unknown Apps,please leave a comment.