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. /* Default Layout: 992px. Less Framework was popular in the early days of responsive design. Eventually, I moved on from fixed-width grid systems and worked on a fully fluid-width one, in the form of Golden Grid System.
Less Framework's popularity was helped by the following contributions and the lovely people behind them (dead links crossed off): LESS Elements: a collection of useful LESS mixins. Dmitryf/elements - GitHub. LESS « The Dynamic Stylesheet language. Cloudhead/less.js - GitHub.