RafflePress - RafflePress is the best WordPress contest and giveaway plugin. Grow your email list, followers, and website traffic with viral giveaways in WordPress.

Img.vision - Image hosting & video hosting for eCommerce sellers

UpViral - Referral marketing platform enables anyone in running effective and profitable viral marketing campaigns – in minutes.

UploadHouse - Thumbnail and resize your photos and images

Tremendous - Tremendous is a customer and employee loyalty platform that allows companies to reward their customers for surveys promotions and referrals.

ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.