Minimalist looking web page with a very nice, brief description about its topic. Also has link to oodles of scenarios contributed by others around a single topic.
Comprehensive evidence-based guide to heuristics and guidelines primarily focused on Web usability, but easily generalized to other types of user experience. Best feature: you can sort the guidelines by title, strength of evidence, and other criteria (ht
Insightful essay on what makes applications usable - applications of all kinds, including CAD systems, scientific visualization tools, and massively mult-player online games.