Open Peeps - A hand-drawn illustration library.
ScreenTray - A better way to capture, annotate and share screenshots
Control Illustrations - 108 free flat illustrations with customizable characters
Annotate by Convergely - Easily annotate images you get on Slack - just like Skitch
Craftwork - A collection of User Interface resources made by Craftwork
Weava - Workspace to highlight, organize & collaborate on your research articles.