Instagram has to be the biggest photo sharing/social media app out there at the moment. Although we don't have a native BlackBerry 10 version yet, thanks to OS 10.2.1 it's real easy to install Instagram on your BlackBerry Z3.
You may notice in the image above that I used my Z30 for the photo. The only reason I did this is that getting Instagram onto your Z3 is done just the same with all other BlackBerry 10 handsets.
I find that using the third party Android APK store Snap is easiest. If you're new to BlackBerry 10 check out how to get it installed here.
Once Snap is installed just follow these simple steps:
Open Snap and perform a search for Instagram
Press the 'Download' tab at the top of the display
Select 'Open Installer'
Press 'Install' and you're done.
You'll need to accept the app permissions and as it's an Android app you don't have the choice to un-check any, unlike with native BlackBerry 10 ones. However, with Instagram then installed you can take photos, alter them with filters etc and share via your social networks.
And with Snap then on your BlackBerry Z3 you can browse as many Android apps and games as you desire.