Mark And Scribble - Fortify your presentation skill by Mark And Scribble.
Shottr - Shottr is a free macOS screenshot app with scrolling screenshots, OCR, annotation and measurement instruments.
Epic Pen - A windows tool for drawing over your desktop and applications
AppLaunchpad - Create free beautiful screenshots for App store/Google play
Zapsnap - Temporary peer to peer screenshot sharing in your browser
TakeaScreen - Take & capture screenshots like a Pro!