http://draw.to/
Simple webapp that allows anyone to create & share disposable drawings quickly without the hassle of starting up external programs, saving & uploading files, etc. It's intended for drawings done ''in the moment'' e.g. during an online conversation, either for fun or to help communicate when words aren't enough. It's 100% free no signup required. Supports all major browsers and sharing methods. Also supports iPhone/iPad/iPod touch.
http://flockdraw.com/
Paint a simple masterpiece. Make a point visually. Do whatever you want. Do it together. Grab a tool. Pick a color. Draw something. Show a friend. Show the world. Share your vision - That is FlockDraw.
http://www.doink.com/
DoInk is a place to enjoy art and animation, and make your own. Draw and animate online easily, collaborate with friends and other artists by reusing props. There's an audience here for you - So if you want to be entertained, learn something new, or create something fun, do it on DoInk.
http://sketchfu.com/
Sketchfu is a website where people communicate with each other through drawing.
http://www.wittygraphy.com/
Wittygraphy is a social network dedicated to caricaturists and caricature lovers. It's a place to share, discuss, and promote the art of caricature.
http://www.myoats.com/
Myoats is a community where people create designs using an online drawing application. These designs can be rated, downloaded, and archived. The Most Liked designs are rewarded by being featured on the home page.
http://www.lovelycharts.com/
With Lovely Charts's extremely simple and intuitive drag'n drop drawing mechanism, you're able to focus on what really matters. Based on the type of diagram you're drawing, Lovely Charts will make assumptions that will streamline the drawing process in a great way.
http://doodlewall.com/
DoodleWall is a online drawing community that provides you with a huge virtual wall to draw on. It's also a great way to browse other drawings on other walls. You can create public walls that everybody can draw (even people who doesn't have an account) or private walls. If you choose private then only the people that you add to your friendlist will be able to draw on.
http://www.bamboospace.eu/
The BambooSpace is an ideal repository for everything people want to collect and share, from thoughts and inspirations to projects. Its a private online space for photos, scribbles, video and even websites. BambooSpace users can also invite other people to view or edit their own spaces.
http://prezi.com/
Prezi allows anyone who can sketch an idea on a napkin to create and perform stunning non-linear presentations with relations, zooming into details, and adjusting to the time left without the need to skip slides. You can create zooming maps of texts, images, videos, PDFs, drawings, and more.
http://www.dabbleboard.com/
Dabbleboard helps people think and communicate visually. Unlike other alternatives, it makes powerful features easily accessible, so that using it feels as natural as using a real whiteboard. Since it's digital, Dabbleboard allows reuse of old drawings, and since it's on the web, Dabbleboard enables sharing of drawings with people anywhere in the world.
http://goanimate.com/
GoAnimate, a platform that allows people to express themselves through animation without having to learn to draw or install any software.
http://www2.shidonni.com/
Sihidonni is an innovative startup, developing a software based online imaginary world for kids. Shidonni provides a virtual universe, where kids and their parents can create their own imaginary world, play & share games, have fun and interact with each other in a friendly, non-violent environment.
http://www.drawgreetings.com/
With Draw Greetings allows you to draw anything, write a personal note and finalize your greeting at zazzle, then send it to someone.
http://www.tersus.com/
Tersus makes it easy to create AJAX web applications. To develop an application with Tersus, just draw a diagram of your application.
http://webcanvas.com/
WebCanvas is a world-wide collaborative painting project. Anyone with a modern web-browser can move around an 'infinite' canvas. Using available painting tools is its also possible to draw and upload images. Furthermore it is possible to view other users painting if they happen to be painting within the same viewing area.
http://www.scribbls.com/
At Scribbls, you can combine thousands of different drawings to create an infinite number of outcomes.
http://www.qlipmedia.com/
QlipBoard enables you to make narrated slide shows of your vacation. Show off your home for sale. Get help with your homework. Invite someone to a party. Talk to your friends in other countries without having to wake up at odd hours. The possibilities are endless.
http://www.scriblink.com/
Scriblink is a free digital sketchpad that users can share online in real time. Sorta like pen and paper, minus the dead trees, plastic, and the inconvenience of being at the same place at the same time.
http://offtype.net/
Offtype is a fast, fun, free and easy way to create your own images online. It allows to draw sketch or road map, to create graffiti, pixel art, drawing, to paint ecard, handwrite message or note. You can share it in your blog, journal, newsletter, message board, email, chat, gallery etc.
http://home.zcubes.com/
ZCubes seamlessly integrates browsing, searching, editing, painting, freehand drawing, cursive hand-writing, audio-video media management, publishing, and much more into a pure Browser Based Platform.
http://www.toondoo.com/
ToonDoo is a cool, comic-creating tool. ToonDoo is a unique place for free and customizable online games of educational value for children of all abilities. You can now just drag-drop or click to create comic strips that express your views, opinions, angst or to just have fun.
http://mydrawings.com/
MyDrawings provides you with a huge and never ending virtual canvas to draw on. Its also a great way to browse other drawings. Simply scroll around the canvas to the left and find a place you'd like to draw. Then just right click and choose edit to begin your drawing.
http://www.mainada.net/comicssketch
Comics @ Mainada is probably the first web application in the world to allow users to draw complete comic strips directly online. It’s free to everyone and can be a great showcast for humor sketch artists to show their art : you can draw online and immediately everyone else in the world with a net connection can see it.
http://drawhere.com/
Use the Draw Here bookmarklet to draw on top of web pages while you are browsing the web. If you save your drawings, other Draw Here users will then be able to see your drawings when they go to the same page.
http://www.queeky.com/
QUEEKY is a Web 2-Tool for people who like drawing and people who love to view sketches. But QUEEKY can do even more: pictures that are painted on queeky can be replayed by the visitors. So you have the possibility to check out how an intersting picture is made..