Ardesia is described as 'usefull software for use your desktop as a Sketchpad. You can write, markup and erase, also, of course, you can use your desktop as normal desktop' and is an app in the Photos & Graphics category. There are eight alternatives to Ardesia for Mac, Windows, Linux and Ubuntu. The best alternative is Gromit-MPX, which is both free and Open Source. Other great apps like Ardesia are Epic Pen (Freemium), Pylote (Free), Crealesson (Free Personal) and FlySketch (Free).
Pylote is a software making it possible to draw on the screen of the computer, like handling various instruments of geometry. It is a software multiplateforme, free (license GNU GPL), made in Python (computer programming language) and PyQt for the graphical interface.
Multiboard Draw On Screen, Marker, Mouse & Keyboard On Screen Display. All inclusive Kit for video tutors, Youtubers, Digital Video Teachers, Educators serving for Kindergartens, Universities. A must be app for digital teachers.
Ultimate Pen is a software only solution which creates a full screen, transparent window, allowing you to draw on top of most applications. Think of Ultimate Pen as an incredibly easy way to doodle on your computer screen.
Front Sketch simulates a glass sketchpad above your computer desktop. You can virtually draw, write, mark, capture on your desktop during run-time. The flexible floating toolbar is in a vertical position.