Responsive And Accessible CSS Framework – Turret.css
Turret.css is a simple, fast extendable CSS library for generating responsive, accessible, mobile-friendly web applications.
Frameworks
Simple and Lightweight Responsive Grid System – IceCream
IceCream is a dead simple and lightweight CSS/LESS framework for creating a responsive grid layout with ease.
A Minimalist CSS Framework – Bijou
Bijou is a lightweight and easy CSS framework for quickly and easily creating your own styles of grid layout, typography, tables, buttons and more.