"Twiddla is a no-setup, web-based meeting playground.
Mark up websites, graphics, and photos, or start brainstorming on a blank canvas. Browse the web with your friends or make that conference call more productive than ever. No plug-ins, downloads, or firewall voodoo - it's all here, ready to go when you are. Browser-agnostic, user-friendly."
"Photoshopping in your browser
Sumo Paint is an online image editor, without need to install anything to your device. It's the most versatile photo editor and painting application that works in a browser. You can open and save images from your hard drive or save it to cloud."