Simple Poll - The easiest way to create polls in Slack
Monosnap - Monosnap is a comprehensive screenshot taking software system that provides users with a fast and accessible way to take screenshots whenever they want. Read more about Monosnap.
Twitter Polls - Polls embedded in tweets
Annotate - Annotate (formerly know as Glui) is the simplest way to capture, annotate and share screenshots.
Surveys in Slack by Polly - The world's first fully immersive Slack-based survey product
LabelMe Annotation Tool - LabelMe is an annotation tool writen in Javascript and Perl for online image labeling.