Some resources I’ve discovered lately for developing mobile sites and apps.
Apps:
Android Developer Kit: http://developer.android.com/sdk/index.html
iOS developer guide: https://developer.apple.com/library/ios/#referencelibrary/GettingStarted/RoadMapiOS/Introduction/Introduction.html
iOS iAd producer: https://developer.apple.com/iad/iadproducer/
Kooaba image recognition technology platform: http://www.kooaba.com/en/business/techplatform
Web:
jQuery Mobile: http://jquerymobile.com/
Mobile Image Gallery Web App: http://tympanus.net/codrops/2010/05/27/awesome-mobile-image-gallery-web-app/
Sencha Touch: http://www.sencha.com/products/touch
WordPress Themes: http://slodive.com/freebies/free-wordpress-themes-for-2011/