I use Snapseed on Android. It's a practical app with many photo editing tools
I like how I can edit my photos here,
King Camera - Cam 360 Selfie Camera, King Camera is one of best, a professional selfie camera app that takes beautiful selfies in seconds with effects filters.
VSCO - VSCO® is an art and technology company empowering people everywhere to create, discover, and connect. CompanyVSCO® is a trendsetting art and technology company that .
360 Camera - Capture 360 photos and videos with your Android device, 360 Camera is one of the most leading camera apps that allows you to enjoy all in one photography experience.
PicsArt - Explore 100,000,000+ awesome images and photos on the web
PanoramaCrop for Instagram - PanoramaCrop for Instagram is a free photography app that allows you to easily splits your wide photos so you can make the most out of the new Instagram’s multi-photo images, created and published by Muffin.
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.