I would like to get list of "+1" Play Store applications of specific contacts. Are there any ways to do this?
Google just added this to the Play Store a few days ago. Open the Play Store and tap the menu in the top left and then tap People. Here you will see an overview and some recommended apps and people. If you scroll to the bottom, you will see a few g+ contacts. Tap "See more" to view a list of all the people in your g+ circles. Then tap on the person you want and all their reviews and +1s will be there.