Explain Everything - Explain Everything is an easy-to-use design, screencasting, and interactive whiteboard tool that...
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Gynzy - Gynzy is the ultimate educational software that helps teachers create engaging lesson plans that will raise student engagment and save time for educators.
Shutter - Shutter is a feature-rich screenshot program.
LiveBoard - Cross-platform whiteboard solution, whether you're teaching or tutoring online, or you want to provide a more interactive experience for classroom teaching.
Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image