Img.vision - Image hosting & video hosting for eCommerce sellers
Twitter Polls - Polls embedded in tweets
UploadHouse - Thumbnail and resize your photos and images
Simple Poll - The easiest way to create polls in Slack
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.
Curious Polls - Answer a question once a day for the chance to win £100/$100