Here we are listing some high PR image sharing sites. Back-links coming from top PR sites command high authority in the SEO parlance:-
https://www.instagram.com/
https://www.tumblr.com/
https://www.facebook.com/
https://twitter.com/
http://www.skyrock.com/
https://www.flickr.com/
https://www.pinterest.com/
http://www.weheartit.com/
http://imgur.com/
http://s1082.photobucket.com/
https://vk.com/
https://myspace.com/
https://www.mediafire.com/
http://imgfave.com/
https://www.dropbox.com/
https://imageshack.us/
https://www.4shared.com/
http://tinypic.com/
http://yourshot.nationalgeographic.com/
http://www.deviantart.com/
http://picasa.google.com/
http://fotos.sapo.pt
http://www.twitpic.com/
http://www.scoop.it/
https://pixabay.com/
http://www.fotolog.com/
http://pbase.com/
https://fineartamerica.com/
http://www.imagebam.com/
http://cloudinary.com/
https://photos.google.com/
http://ge.tt/
https://www.dpreview.com/
http://www.fotki.com/
http://webshots.com/
http://www.imagevenue.com/
https://imageshack.com/
http://gifboom.com
http://visual.ly/
https://www.lomography.com/
https://www.taringa.net/
https://www.photo.net/
https://www.photobox.co.uk/
http://imgsrc.ru/
https://chevereto.com/
https://www.slickpic.com/
https://ctrlq.org/
https://imgsafe.org/
http://www.blujay.com/
https://www.imageupload.co.uk/
https://youpic.com/
http://www.iforce.co.nz/
https://postimage.io/
https://imgup.net/
https://www.irista.com/
http://xtupload.com/
https://www.ritzpix.com
http://www.yuuby.com/
http://www.imageno.com/
https://pixady.com/
http://www.bytephoto.com/
http://www.freespace.com.au/
http://imgbin.org/
http://myphoto.eu/
http://imagevup.com/
http://www.picturetrail.com/
https://www.shutterfly.com/
http://www.ebaumsworld.com/
https://www.myheritage.com/
https://justpaste.it/
http://dayviews.com/
http://funnyjunk.com/
https://wanelo.com/
http://www.23hq.com/
http://www.mobypicture.com/
https://www.snapfish.com
https://morguefile.com/
http://www.ipernity.com/
https://www.keepandshare.com
https://imgbb.com/
https://www.cincopa.com/
https://fancy.com/
http://postimages.org/
https://www.turboimagehost.com/
http://imageevent.com/
http://www.freeimagehosting.net/
http://www.use.com/
https://dropshots.com/
https://www.smugmug.com/
https://pixieset.com/
http://www.fotothing.com/
https://www.thefreesite.com/
https://myalbum.com/