I asked for feature requests for Nikola my static site generator. I got some. One was from long-time user Kay Hayen, so I just couldn't say no.
He asked for tag clouds. Look:
Cute, isn't it? And it's real, actual tag data from this very site. With links!
How it's done:
Nikola generates a JSON file that has the cloud data (tag name, size, link), and that's processed by JQuery and tagCanvas and ... well, it works.
You have to add jquery.tagcanvas.min.js somewhere and embed a whole pile of raw HTML (see here for details) but hey, it works.
It's probably rather "easy" to make it use any of these instead of tagCanvas if anyone is so inclined.