Back in the '90s: Kaleidoscope Schemes
This article is hideously backdated to reflect the time that it's content, the gallery below, was created. Sorry for the confusion. If you're curious, I'm writing this on June 9, 2013. This is about the oldest part of me that lives on the internet. Back in the late '90s, there was an interface enhancement for Macintosh computers called Kaleidoscope. It was essentially a version of the "themes" concept that Apple kind of introduced into their operating systems, but really didn't. You could download any number of new interface themes (or "schemes", as the creators called them) for your operating system. Some of them were pretty cool. I made a few of them. In hindsight, they don't seem to have strayed too far from the general appearance of the Mac OS (version 9, at the time). They looked like this:
All of these are still, inexplicably, available at the Kaleidoscope Scheme Archive. You can access my stuff directly here, though. If you're really excited by the potential of this awesome piece of 1990's tech, be sure to check out the "scheme spotlight" area, wherein the best of the best are framed and hung on the metaphorical wall.