Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Img.vision - Image hosting & video hosting for eCommerce sellers
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
UploadHouse - Thumbnail and resize your photos and images
JPEGmini - JPEGmini - The Photo Optimization Tool Trusted by Tens of Thousands Image Perfectionists
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.