Android has given us millions of apps and it's very difficult to choose some from them.So,now i will tell my viewers about 10 must have android apps :-

1. Neo reader :- This software helps you to scan QR code with your phone. QR code is a code through which you can go to a webpage from your phone by clicking the picture of the code from your phone.
                                                  

2.  Office
suite pro 7 :- This software helps you to open all the files that you open in  computer using Microsoft Office like Excel,Word,Powerpoint Presentation etc. This software is not free at play store so you can either download it through black mart or from here( Go to the ending of page and click download).Install the file you downloaded in the pc .Its an apk file.
                     
                   

3. MX player :- It's one of the best Video players for android. Using it you can zoom the video,Increase brightness of the video,increase volume easily. It plays maximum video formats easily.

                                                            
4. Skype :- Using skype you can call your friend (if he also has skype) for free if you have an internet connection or wifi in your phone. If your cell phone has front camera you can also do a video chat through it.

                                                              
                                                                         OR!

Viber :- Viber is something similiar to skype but through it you can't do video calls but can also do chatting through it.
                                                                      
5. Tubemate :-using tubemate you can download/play youtube videos. Download link and info here

                                                          
TUBE MATE IS NOT AVAILABLE ON PLAY STORE.

6. Blackmart :-  http://www.ndroidworkshop.net/2013/04/how-to-get-paid-apps-for-free.html info and download link

7. Link2Sd:- It helps you to transfer your files from your internal storage to external sd card.It needs ROOT.
http://www.ndroidworkshop.net/2013/04/how-to-install-apps-on-external-card-in.html click here to see how  to use it and install apps on ext sd card.
                                                                      
8. App Backup and Restore :- Using this you can backup all your apps (change storage settings to sd card ) so if your internal storage gets formated you can install this app from play store and reinstall all apps easily without downloading.
                                                                       
9. Download Mp3:- Using this app you can download songs in your phone. Just type the name of the song and click search , then a list will  appear click on the song you want to download and it will start downloading
                                                                        
10.  Power toggles :- This allows users who dont have shortcuts on notification bar to add some.