Android User Interface Development is a book totally dedicated to show how to create user interfaces for mobile applications based on Google Android OS. The book is written by Jason Morris and it is published by Packt Publishing.
Apache Mobile Filter
Apache Mobile Filter by Idel Fuschini is one of the latest interesting projects dedicated to the mobile world.
Apache Mobile Filter is based on one of the most used open source projects for mobile world: Wireless Universal Resource File (WURFL) by Luca Passani.