Explain Everything - Explain Everything is an easy-to-use design, screencasting, and interactive whiteboard tool that...

skribbl - Word guessing based on drawing.

Gynzy - Gynzy is the ultimate educational software that helps teachers create engaging lesson plans that will raise student engagment and save time for educators.

LetsDraw.It - Guess and Draw, Drawing Battle, Pictionary, Copy picture - online drawing games where you can compare your skill with others.

LiveBoard - Cross-platform whiteboard solution, whether you're teaching or tutoring online, or you want to provide a more interactive experience for classroom teaching.

gartic.io - Draw, guess, and win!