Aww App is a simple browser-based application for creating drawings. To get started just go to AwwApp.com and click on "start drawing." To invite people to collaborate on your drawing just send them the link assigned to your drawing board and they can join in the drawing fun. Aww App will work in the browser on your laptop, Chromebook, Android tablet, and iPad. If you would like to use Aww App on your classroom or school website and you have familiarity with editing the code of your site, you can
FlockDraw is a simple service that allows people to quickly and easily collaborate on the creation of a drawing. To use FlockDraw simply visit the site, click the "start drawing" button, and start drawing. To invite other people to draw with you, just send them the url assigned to your drawing board. What's really neat is that anyone who visits the url after the drawing has started will see all of the drawing motions they missed unfold in front of them. You can embed your FlockDraw drawings into a website.
Realtime Board is a nice tool for hosting online, collaborative brainstorming sessions. I've featured the service a couple of times since its launch last fall. The service allows to work with any information and visual content on one board individually or with the team. You can draw, work with images, post videos, post and mark PDFs, write notes, and comment on materials through the use of colorful post-it stickers. Realtime Board supports importing files from your Google Drive account. Realtime Board offers a free education version. The education version provides schools with all of the features of the Pro version for free. That means you can create unlimited private and public boards, have an unlimited number of collaborators, and 3GB of storage space.