One of the most used whiteboards is IDroo, a free app that can be downloaded at the following link:
Enhance your online session on Yondo with this simple yet professional whiteboard. Draw and sketch online, share ideas as if you were in the same room. This app includes a professional math typing tool for math and science tutors.It also provides features such as:
· Collaborative meetings with many participants (10 or even more).
· Insert simple and complex mathematical equations.
· Draw and write your ideas.
· Express your mind through images.
· All drawings are easily editable vector graphics.
· Works with Wacom Bamboo, Wacom Intuos and other digital tablets.