The first Bootstrap 4 alpha has been released. There are many new features:

Moved from Less to Sass.

Opt-in flexbox support is here

Consolidated all our HTML resets into a new module, Reboot.

Brand new customization options.

Dropped IE8 support and moved to rem and em units.

Improved auto-placement of tooltips and popovers thanks to the help of a tool called Tether.

You can find more information at:

http://blog.getbootstrap.com/2015/08/19/bootstrap-4-alpha/

Download at:

https://github.com/twbs/bootstrap

There are also new "Official Bootstrap Themes" with brand new components and plugins, stunning examples, custom docs, free upgrades and more:

http://themes.getbootstrap.com

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We would love to see some Laravel apps with the new Bootstrap 4!