Intro to @viewport & other new Responsive Web Design CSS features

Responsive design: techniques and tricks to prepare your websites for the multi-screen future

Optimizing your layout for phones and tablets using viewport and media queries

Opera and the Open Web platform

Business as usual: bringing the world wide web to whole wide world

Fast & Furious: Speed in the Opera browser

Building rich apps with HTML5 and friends

Opera Widgets for Desktop and Opera Dragonfly

Mobile web development techniques (and Opera's developer tools)

SVG in Opera’s desktop, mobile & TV browsers — edition 2011

Progressive Web Apps: Opera's perspective