Airsketch - Simple screenshots + annotations for Mac 🖥️
dashi by Premast - Create dashboards in a snap
FakeClients Feedback - 🖌 A simple, free to use platform for design feedback
Annotate by Convergely - Easily annotate images you get on Slack - just like Skitch
Slack E-mail Add-ins - Quickly forward emails and attachments to Slack
Collaboration from CloudApp - Collaborate with commenting, annotations, and faster sharing