Between starting the book in September of 2010, a lot of mobile pattern collections have emerged.

I actually disagree with the principles behind most of them. Not all, but many. I've talked about this in some presentations, so for the record:

• Screenshot focused.
• Few or no explanations.
• Interface focused, with few nods to interaction.
• Too focused on one OS. Mostly, iOS.
• Mostly, really, iPhone. Far too often mobile means handsets.
• One tier of organization, and no cross-referencing. If you don't get their method of organization or referencing, you may not understand what options are available.

Of course, you may disagree. The presence of these is another key reason I am not worried about having too many screenshots in my patterns. Enjoy:

• Android Patterns - One of my favorites, each pattern is drawn, has a lot of explanations and describes the interaction, and there's a really snazzy organization to help you drill down to the options available for your design problem.

• Lovely UI - A collection of mobile UI elements.

• Mobile Design Pattern Gallery - Also an O'Reilly author, Theresa Neil has published this supporting website with the patterns from the book. They are abstracted at the top level, then explained as screenshots.

• Mobile Patterns - Ryan Sims' collection of patterns, with the opportunity for you to contribute your own to the collection.

• Mobile UI Patterns - Mari Sheibley's quite large, and regularly updated, collection.

• Pttrns - By By Robin Raszka & Chemix, seems to be more focused on interfaces (screen design) than even the others.

• Screenshots for Designing Mobile Interfaces - This is just a collection on Flickr, of all the screenshots (or often, photos) of the various devices I own. Not organized into a library, but if you were looking for an old device especially, it might be here. Enjoy.

Anti-Patterns & Worst Practices

What would our jobs be without making fun of others? But really, it's important to recognize bad solutions, and know why they are bad so we can all improve. Here's a couple places that collect bad mobile solutions.

• WTF Mobile Web also on twitter @WTFMobileWeb. This also explains real well the point of sharing antipatterns.

• We have a mobile site!