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.
J. Teevan, C. Alvarado, M. Ackerman, and D. Karger. CHI '04: Proceedings of the 2004 conference on Human factors in computing systems, page 415--422. ACM Press, (2004)