Doing some software archaeology with @jimmac today, looking at webOS on the Touchpad and Palm Pre.
It's very cool to see how far ahead of its time this was, and also how many elements from it survived in GNOME in some form! And of course, the multitasking is still unmatched by any more recent mobile platform :)
A quick look at some of the core apps and in-app UI patterns, including Calendar and Photos.