I use Snapseed on Android. It's a practical app with many photo editing tools
I like how I can edit my photos here,
Zeplin - Collaboration app for UI designers & frontend developers
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 .
Abstract - A secure, version-controlled hub for your design files
PicsArt - Explore 100,000,000+ awesome images and photos on the web
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.