Hawthorne is a mobile-first HTML5 template featured by minimal style and nice typography. Free HTML template by Typeandgrids. get it here
Hover.css is a collection of CSS3 powered hover effects to be applied to call to actions, buttons, logos, featured images and so on. Easily apply to your own elements, modify or just use for inspiration. Available in CSS and SASS. A repository by IanLunn. get it here
Flatty is a flat landing page designed to show your next app, site or product. With a fresh style & minimal design, you can now show your product with style. get it here
Here is a flat design user interface inspired to a PSD freebie by GraphicBurger. This HTML5 + CSS3 ready-coded template is not complete yet, but it’s a good starting point if you mean to build an interface like that. Coded by Javier Latorre López-Villalta. get it here
Opening images seamlessly in a lightbox on your page without interruption. This demo was inspired by how Medium handles embedded images. Made by Terry. You can read the tutorial on Medium.