ReferralHero - Powerful referral marketing platform for honest marketers.
Img.vision - Image hosting & video hosting for eCommerce sellers
Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
UploadHouse - Thumbnail and resize your photos and images
Ambassador - Referral Automation, Made Simple.
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.