CaptionBot by Microsoft - Analyzing and describing images by a bot
Twitter Polls - Polls embedded in tweets
Dashmote - Dashmote bundles stock image providers to make finding stock images as easy as possible.
Simple Poll - The easiest way to create polls in Slack
Instagram Line Break - Simple clean line breaks for your Instagram captions
Curious Polls - Answer a question once a day for the chance to win £100/$100