Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
PhotoFunia - PhotoFunia is a leading free photo editing site packed with a huge library of picture editor effects & photo filters. Edit pictures with online pic editor.
Flickr - image and video hosting website
Canva Online Photo Editor - Canva is a robust platform that comes with an online photo editor to edit all your images.
Photobucket - Photobucket offers image hosting and free photo and video sharing.
LoonaPix - LoonaPix.com is a way to make funny photo online.