Develop smart phone app with Phonegap
A must see open platform
The greatest convenience derived from PhoneGap is that it supports various smart phone app development, iPhone, Android, Windows Mobile, Palm, Blackberry, Symbian. As such, it is relatively easy for you to make your applications running on different types of smart phones. It also offers nice documentation.
There are many apps already using Phonegap for developing smart phone apps (mainly iPhone apps as current).