announced a few days ago the Oracle APEX Theming Competition.
Make an awesome APEX theme and you may win some cool prices!
In the Learning Resources on the ODTUG site you will see a reference to my presentation of last year "Advanced Responsive Design in APEX". In that presentation I showed a lot of live demo's from different aspects of Responsive Design: here's a quick overview of what I covered:
I made the RWD demo app available online now, so you can see it in action or you can download the app and install it in your environment (the zip includes the presentation too).
Hopefully it will help some people doing a responsive design theme.
Another tip that might help; make use of SASS or LESS to generate the CSS. There's a great SASS tutorial (video/material) on SASS from Hampton Catlin, the creator of Sass, which explains why and how to use it.
I look forward to the result of the competition. I'm always impressed with what people come up with.