Web safe CSS font stacks

http://cssfontstack.com/

CSS, HTML, JavaScript, DOM, PHP, and Python documentation in one place

http://dochub.io

Ideal Forms: a comprehensive jQuery library for building and validating responsive HTML5 forms

http://elclanrs.github.com/jq-idealforms/

Kodiak PHP: The only iPad app with offline PHP code execution.

http://www.becomekodiak.com/

Annotator

http://okfnlabs.org/annotator/

Responsive Design case study

http://builtbyboon.com/blog/responsive-design-case-study

Efficient Wireframing of a Web Form

http://designmodo.com/wireframing-web-form/