Type-a-file. HTML5 Boilerplate. Less Framework 4. I called Less Framework "a CSS grid system for designing adaptive websites".
It was basically a fixed-width grid that adapted to a couple of then popular screen widths by shedding some of its columns. It also had matching typographic presets to go with it, built with a modular scale based on the golden ratio. The resources it was originally published with are still available on GitHub. Contrary to how most CSS frameworks work, Less Framework simply provided a set of code comments and visual templates, instead of having predefined classes to control the layout with. This is how I still work today and definitely a method I advocate. 960 Grid System.