I use Snapseed on Android. It's a practical app with many photo editing tools
I like how I can edit my photos here,
Snaptivity - Real-time photo sharing with the world nearby
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 .
Flashgap - Time-delayed photo-sharing app of last night's embarrassment
PicsArt - Explore 100,000,000+ awesome images and photos on the web
WiFi Map - A crowdsourced list of routers and passwords
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.