Flickr is one of the largest and most popular photo sharing websites around. They let you upload photos for free – till a certain limit – and if you pay the very nominal fee, you can upload as many photos as you want on the site. They also have a pretty good permissions system that gives you, the user, control over who does or does not see the pics that you’re uploading. But that is not even the best part about Flickr. The best part is the awesome community that the site has and the knowledge that one can gather by just ‘lurking’ around the various photography groups and the forums. - David.R.Gilson