This is the first iteration of something I've been tinkering with for a while now (read: this is very much a beta). I'm sure there are bugs I haven't caught yet, but I wanted to get this out there in the world now, because the longer it just sits on my local server, the longer I'm going to procrastinate working on it.
Cache Override is a flexible ExpressionEngine plugin that provides cache-busting URLs for requested assets.
I've been working on an implementation of Harry Roberts' CSS Specificity Graph using PHP and D3.js.
Want regex filtering for the Twitter web UI? There's an extension for that.