Milligram: Minimal CSS framework

Milligram is a minimal and lightweight CSS framework to build websites. It is ideal for front end developers that need a design agnostic framework.

Milligram: Minimal CSS framework

Material Design Lite framework

Material Design Lite is a lightweight framework based on Google Material Design. It doesn’t rely on any JavaScript frameworks.

Material Design Lite framework

Semantic UI framework

Semantic UI is a development framework based on user interface language you can use to build websites. It’s a great alternative to Bootstrap.

Semantic UI framework

Bootflat - Flat UI kit for Bootstrap

Bootflat is an open source flat UI kit based on Twitter’s Bootstrap 3.1 CSS framework. It provides a faster way to create elegant web apps.

Bootflat – Flat UI kit for Bootstrap