2012
Website User Testing the Usabilla Way - Features
by oseres2011
Useful Wireframing and Prototyping Tools – Roundup
by oseres2010
2009
Alkaline - Litmus
by nhoizey2008
How people really use the iPhone - SlideShare
by greutWe recently published "How people really use the iPhone", an interesting readout of design issues and recommendations for people designing for the iPhone and beyond. Our presentation on this topic at the iPhone Developer's Summit was called the "best presentation of the conference" by several attendees.
Some of the problem exposed applies to other system imho.