Guideline heuristics for creating accessible digital content, interfaces and services for people living with dementia, including Alzheimer's disease.
Designmodo — Responsive Web Design Test Tool
Another development resource, beautiful in its utility, from the good folks at ZURB. Built with their wonderful Foundation front-end framework. Supersedes Weedy Garden's HigherEd RWD Directory and Brad Frost's Responsive Navigation Patterns as my favourite source of responsive design inspiration.