Img.vision - Image hosting & video hosting for eCommerce sellers
Freaking News - Freaking News is a Photoshop contest site that enables you to upload your creations to get a place on the front page.
UploadHouse - Thumbnail and resize your photos and images
Pxleyes - Pxleyes is an online Photoshop contests site that enables you to submit your photos to get a chance of having them placed on the front page.
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.
Bitpine - Bitpine is a community-led image-sharing site that aims to help beginners and experts submit their creations online.