MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Img.vision - Image hosting & video hosting for eCommerce sellers
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
UploadHouse - Thumbnail and resize your photos and images
Mailjet - All-in-one email service provider that provides maximum insight and deliverability results for both marketing and transactional emails.
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.