InstaPicFramePRO
This app has powerful functions and it is very easy to use. You can use this app to merge lots of photos into one photo through a very simple operation.
and you can post the photo to instagram.

Features:
  • You could customize the style or use templates to merge photos.
  • Shake your Android device to change the photo template.
  • Provides a lot of beautiful frames and background templates to make the result photo much more beautiful.
  • You could share your photos to instagram, Facebook, Twitter, Tumblr and Flickr.
Required Android O/S : 2.2+

Screenshots InstaPicFramePRO:

 

Download InstaPicFramePRO: 10Mb APK