Now your first choice, the way I see it, would be to buy my own retro future art calendars; but if you’re looking for something else (and for free!) you should fire up your PDF reading rocket pack and jet on over to The Website at the End of the Universe, where you’ll find a downloadable, printable calendar for 2011 whose theme is "sexy women and the mad scientists that love them" or, possibly, "sexy women and the mad scientists that love to keep them in tubes".
It’s sort of low fi, which is my way of saying "low res", but it’s still a full twelve months of demented research and scantily clad dames. Which is all you can ask for, really, isn’t it?