Gromit-MPX is an on-screen annotation tool that works with any Unix desktop environment under X11 as well as Wayland.

The Swiss Army Knife of Screen Annotation Tools

ScreenPen is a simple screen annotation software that allows drawing directly on the screen.

DrawPen is a simple screen annotation. Available on macOS, Windows & Linux.

A community for Presentify users.

Give better presentation with Screen Annotation and Cursor Highlight.

Simple screen annotation software.

A C# WPF Desktop Drawing App

This has now moved to GitHub Communities.