Unixstickers by Sticker Mule - Stickers for fans of unix, software, coding and open source
Img.vision - Image hosting & video hosting for eCommerce sellers
Acrylic Charms by Sticker Mule - Add some charm to your life.
UploadHouse - Thumbnail and resize your photos and images
Chumpu iMessage Sticker Pack - Animated Chumpu cartoon stickers for iMessage
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.