Hamburgers is a collection of animated css3 hamburger menu icons made by Jonathan Suh Preview
With label.css you can easily label any element you want by simply adding the class label and the data-attribute data-label Preview
Leaf is a CSS framework based on google’s material design.
Geo is a timeless theme built for Twitter Bootstrap using Bootswatch.
Paradeiser is a css only mobile navigation menu with no js required and it is only 1.3kb.
Skyline helps to build custom CSS framework for your website. it comes with a great CSS architecture and enables to develop reusable codebase.