So, I've been working on a little project the past couple of days... I have been creating my own responsive, grid based CSS framework. This is designed to be extremely bare bones - there is literally nothing other than the grid itself and some colours.
A free and simple CSS grid system build with a minimalist approach. mnml CSS is not a full UI framework - rather, it is a small stylesheet, a few kilobytes in size, designed to help you create responsive websites.
mnml is available today on GitHub. Feel free to star & fork it.
I'll be allowing people to make contributions as long as it respects the core values of the framework itself. https://github.com/thinkallabout/mnml-css