Chartaca is a service that provides free charts for real-time data. No sign-up required. You just create charts as you need them. The inspiration for this service is Mailinator, which provides free no-sign up email accounts. I decided to do the same thing with charts.
have fun!
Richard Rodger
Thanks for your interest!
The Chartaca service has just launched with a free version. Premium features will be available soon. Vote for the features you need, and sign up to the newsletter to hear about new features as they go live.