Privacy notice on Flickr's home page.
Flickr
flickr

Flickr bug led to private photos being shared 

500px
500px
500px

Banned 500px photo app returns to iOS -- with age restriction 

The new photo-editing interface in the Twitter app for iPhone, left, and Android.
Twitter
photos

Snapshot of the new ways to share smartphone photos

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Facebook and Instagram icons on phone.
Reuters file
instagram

Instagram snaps shutter closed on Twitter

FB photo sync
Facebook
Facebook

Facebook's latest feature: Automatic photo syncing

Instagram photos on iPhone
Suzanne Choney / NBCNews.com
instagram

Get Instagram prints from ... Walgreens

Galaxy Camera
Samsung
samsung

Samsung's Galaxy Camera is half phone, half point-and-shoot

Bump 3.0
Tecca
iPhone

'Bump' now lets you easily share phone photos to computer 

Twitter

Twitter's photo-sharing outdoes the rest