Our company has started a new project to develop a mobile App on Android, iPhone and J2ME-based mobile phones. This is really a big project and many new services will be added to this App in future. My #1 concern is coding the same App (business+UI+...) on different platforms. Is there any framework/tool/library/etc to code once and then get the App on these platforms? How can I manage my App easier?
Edit 1:
It seems that there are lots of frameworks for my case such as RhoMobile, Appcelerator, PhoneGap, etc. Which of these frameworks fits better to my needs and is more stable and convenient?