This page is deprecated in favor of the Mobile Guide documentation on drupal.org.
In addition, most of the projects listed below have been abandoned, deprecated or do not have Drupal 7 versions.
This is a Wiki page! [edit]
Drupal Modules
Check the mobile category on drupal.org
Mobile Themes
http://drupal.org/project/mobi
http://drupal.org/project/mobile
http://drupal.org/project/nokia_mobile
http://drupal.org/project/fusion_mobile
http://drupal.org/project/iui
Responsive Themes
http://drupal.org/project/adaptivetheme
http://drupal.org/project/omega
http://drupal.org/project/zen
Mobile analytics
http://drupal.org/project/bango
Mobile Interface Enhancements
Theme switching / redirection
http://drupal.org/project/accessibility
http://drupal.org/project/mobit
http://drupal.org/project/mobi_loader
http://drupal.org/project/mobile_theme
http://drupal.org/project/switchtheme
Mobile Payements
http://drupal.org/project/mobillcash
http://drupal.org/project/ec_mobillcash
SMS
http://drupal.org/project/smsframework
Device detection
http://drupal.org/project/mobile_devices
http://drupal.org/project/wurfl
Mobile Journalism
http://drupal.org/project/vozmob | http://vozmob.net
varia
http://drupal.org/project/mmb
http://drupal.org/project/mobile_codes
Development tools
Tutorials
Posting video from mobile phones into drupal
Making a Boost cached site mobile