Gadfly can make free-standing SVG plots that have built-in pan/zoom interactivity using pure julia code (no C dependencies). to illustrate, click or shift-click on the color swatches in this example. hover in the plot and press the question mark (?) for a full list of capabilities.
i find it really convenient to be able to share such plots with colleagues who do not necessarily use julia. or even for my own use, to view them later without having to start julia and re-plot.