Best Cross-platform development tool for iPhone & Android [closed]

Question

I know that similar questions were asked a lot of times already,
but today when you have so much choice I really need an advice of some one who already have an experience in cross-platform development.

I am planning to develop few applications for Android and iOS. The applications will have to store data on the device,use calendar,send email,to talk with remote servers.As you see it is nothing special here.

I have found quite long list of platforms :

Corona(Supported Features)
Moscrif
Icenium
Appcelerator
PhoneGap(Supported Features)
Titanium
e.t.c.

Some of this platform are free and some with subscriptions. For now I want to try some free and well documented platform that uses HTML5,JavaScript,Java or C#.
I will glad to hear recommendations and opinions.

Answer 1

• RhoMobile – This is a solution that uses Ruby, especially loved by Ruby on Rails developers. (Free only for noncommercial applications, prices vary)

• Appcelerator- – This is a solution that allows you to develop native apps with HTML/Javascript (run through a UIWebView on iPhone) . (Free)

• PhoneGap - Similar to Appcelerator, I mentioned these two as they seem to have the most vibrant communities, and most extensive support. (Free)

• WidgetPad are good cross platform development tools. Out of these I would rather prefer Phonegap for iOS and Android Development.

Edit- Why I prefer Phonegap

Phonegap is framework to deploy your web based skill to multiple platforms.

Phonegap just executed inside a UIWebView control, and the PhoneGap JavaScript APIs your js calls are routed to native APIs.

Advantages of Phonegap:

• Build your app once with web-standards
• Wrap it with PhoneGap
• Deploy to multiple platforms!

Review the link for Comparison between Corona, Phonegap, Titanium