Very cool new tool from Trading View: Embeddable, auto-updating real time charts in HTML5.
You can add all sorts of indicators and studies to these (MACD, RSI, Bollinger, etc.), as well as add your own lines or text annotations.
What makes these so unusual is that I can embed a chart (below), and you can pull up that same chart months or years from now, and it will automatically update as of that date, with the current price and up-to-date chart.
Oh, and its real time, not delayed quotes.
They are still in beta, but the product as currently configured looks really slick.