Helium CSS
Description: Helium CSS is a lightweight CSS framework for building responsive websites quickly. It provides a grid system, UI elements, utilities, and themes to start prototyping and developing sites faster.
Type: software
Pricing: Open Source
uCSS
Description: uCSS is an open-source CSS preprocessor that adds features like variables, mixins, and functions to regular CSS. It allows writing more maintainable, reusable CSS code.
Type: software
Pricing: Open Source