Tracer

The web based agile project management system
http://code.google.com/p/tracer/

Tracer is an open source, web based platform which helps agile(or similar) projects to collaboratively plan, design, develop and innovate faster.

Android design standards

Learn how to design exceptional Android apps
http://developer.android.com/design/

The design principles and UI guidelines outlined in the site will help developers build visually compelling apps that look great on any device .

Drupal

Take a splash into the powerful open source content management system
drupal.org

Drupal is an open source content management platform powering millions of websites and applications. It’s built, used, and supported by an active and diverse community of people around the world.

Mobile web

Future of the web is Mobile
A collection of valuable resources from smashing editorial team

This overview features a hand-picked and organized selection of the most useful and popular Smashing Magazine’s articles related to design and development for mobile devices and published here over all the years.