What other Design Languages Exist?

Question

Im really into Web Design techniques and skills and I would like to know what other Design Languages Exist?

I only know two: Material Design (Google) Metro Design (Microsoft)

I would like to practice them all..

Thank you

Answer 1

There are a couple that come to mind:

Google's Material Design Guidelines

Apple's iOS 8 Flat Design Guidelines

Microsoft's Metro Design

Bootstrap (not necessarily a design language, but it does have its own 'style')

Oracle Alta UI

GNOME Human Interface

General Design Guidelines for the Modern World

Some extra hints on how to go about designing here.

The most popular ideas today are flat designs, vibrant colors, and smooth animations.