I really miss Kaleidoscope. No OS theming system I’ve come across since has been as smooth and all-encompassing — WinXP/Win7 msstyles and the various themeable bits in a Linux desktop come closest, but still fall short because they’re often incomplete and using them is a multi-step process.

With Kaleidoscope, you just double-clicked the scheme file in the Finder and _everything_ was themed, from window frames to buttons to fonts to icons, and there were practically no limits to what scheme designers could do. There were a lot of impractical schemes, sure, but they were creative, fun, and personal in a way computer UI hasn’t been in ages. Just take scroll through the tweets of this Kaleidoscope twitter bot for a taste: https://mobile.twitter.com/kaleidoscopemac