For no particular reason at all, Redis Labs' Itamar Haber took a D3.js swing at the bulk of Redis' 160-ish commands, creating an interactive visualization of the lot of them - in Redis colors, of course. According to Haber, it's set up like this:
... [the] commands are grouped by topic and zooming in/out is by clicking the mouse. Each command is represented by circle, whose size roughly corresponds to the command's asymptotic time complexity. Clicking a command will open its documentation page from redis.io.
That said, it is a pretty interesting way of looking at it:
(Source: Itamar Haber at Redis Labs)
Keep in mind that this is just the image - to get interactive with it, check out Haber's original post and see what hidden Redis gems you might find.