Epic Pen - A windows tool for drawing over your desktop and applications
Presentify - Screen Annotation and Cursor Highlight for macOS.
gInk - An on-screen on-screen annotation software for Windows.
PointerFocus - Allows you to highlight the cursor using either the toolbar or hotkeys.
ZoomIt - Presentation utility for zooming and drawing on the screen.
Pen Attention - A free program that places a highlighted circle or square around the cursor for use in a classroom...