Flickr

General - Content posted by the European Union

Mapchecking

Google - Groups

Google+

hi5

Instagram - Gramrix

Mappillary

Instagram - Gramvideos

Instagram - Instidy

Instagram - Picbear

Instagram - Pictame

Instagram - Someture

Instagram - StatFlux

Instagram - Yooying

LinkedIn

NewspaperMap

LinkedIn - Findera

Match.com

Meetup

Myspace

OurTime.com

Pinterest

Pinterest - PinGroupie

Professional Finish Line Timing & Results

Reddit - Metrics

Reddit - Archive

Reddit - Ceddit

Reddit - Metareddit

Reddit - Mostly Harmless