Imgur is a free and simple image hosting service with image editing feature. Signup is optional. Imgur is pronounced like image-er; imager.
Instagram is a fast, beautiful and fun way to share your life with friends through a series of pictures. Snap a photo with your iPhone, choose a filter to transform the look and feel, send to Facebook, Twitter or Flickr – it’s all as easy as pie. It’s photo sharing, reinvented.
Online social photo and short video sharing community. Flickr helps you organize that huge mass of photos you have and offers a way for you, your friends and family to tell stories about them.
500px lets you create stunning professional photo portfolios, find friends, express yourself and connect with likeminded people.
Provides free image upload and hosting integration for forums. Free picture hosting and photo sharing for websites and blogs.
Photobucket offers image hosting and free photo and video sharing. Images can be organized into albums. Up to 2GB is available as a free starting, the lowest paid plan give 52 GB plus many other plans