This is Parallelism, a responsive portfolio site template by HTML5 UP. free for personal and commercial use under the CCA 3.0. The awesome demo images used in this design

This is In Response, a simple but useful website template made with standards-compliant HTML5 and CSS3 only. It uses two fixed-width grid systems (12 columns), which both scale down to a full-width single-column layout on devices with low screen widths. The template is based on the Freestyle template and has an alternative light-on-dark design option […]