PhoneGap

“In essence, Nitobi is building out a ‘write once, run anywhere’ platform for mobile application development… One of the co-creators of PhoneGap said, ‘The idea is you write one code base and it should work smoothly on all devices.'”

– eWeek. Read more >

obviously, this one is the thing!

Sencha – Sencha Touch Overview – HTML5 Mobile App Framework

The World’s Best Devices

Sencha Touch is a cross-platform library aimed at next generation, touch enabled, devices. Our initial beta is compatible with iOS and Android, which together represent over 90% of current US mobile traffic. Android developers can also make use of a special theme we’ve created just for Android. With the ever-rising number of Android devices and the widespread popularity of WebKit on mobile systems, we expect our supported device list to grow very rapidly.

Mono:ARM – Mono

Fully bootstrapping on little endian Linux system. Should also work on big endian systems.

Mono today runs on the iPhone, Android, it is known to run on ARM desktop machines, the Nokia 770, Nokia 800 (OS version 2005 and 2006) and the Linksys NSLU2.

It also supports the new ARM ABI (gnueabi also known as armel).

It can run all of our software up to Gtk# and the startup time is outstanding on the Nokia 770.

 

another x-platform dev environment for modern mobiles… .NET hmm…