Marker.io for Slack - Turn screenshots into Slack messages ✌️
Dragshare - Drag files to your menubar and share the Dropbox link
Instashot - Access text from any image instantly.
Losha - Easily share Dropbox files and folders in your menu bar
ScreenTray - A better way to capture, annotate and share screenshots
Apple Keynote - Apple Keynote or just Keynote is an advanced level presentation software application created as a part of the iWork productivity suite by Apple Inc.