I have been using foundation and bootstrap for Making Responsive wordpress theme, i also have an Experience in Creating Theme option for wordpress Themes,
and also been selling few themes on mojo and has learned The themeforest theme option in detailed which i can even create for any theme.
I have been using foundation and bootstrap framework for Making Responsive HTML and then using that HTML to make you the word press theme with fully backend theme option, I have the knowledge of post types, custom fields, plug-in modification etc.
More over I have knowledge of Photoshop, illustrator, CSS3 Media Queries, so whether your requirement is PSD development or only Responsive HTML required I can do that.
I also have the knowledge of hosting too, as has been handling VPS Server, Dedicated server and other shared hosting whether window or Linux. I also have experience in removing the malware from the website if someone is having issue with hacking.