Flexify

Flexify is a frontend framework.

Responsive grid

<section class="fx-g">
    <div class="fx-g__box fx-g__box--12">
        Header
    </div>
    <div class="fx-g__box fx-g__box--12 fx-g__box--md-8">
        Content
    </div>
    <div class="fx-g__box fx-g__box--12 fx-g__box--md-4">
        Sidebar
    </div>
    <div class="fx-g__box fx-g__box--12">
        Footer
    </div>
</section>

Documentation

http://web-profile.net/flexify/