Over the last year or so the market for enterprise-ready mobile cross platform development has begun to take-off. Large and medium sized companies are increasingly adapting to the mobile world and realising the need to offer tablet and smartphone access to their line-of-business apps, as well as the benefit of rolling out their own enterprise-to-customer apps. The need for the ability to rapidly develop and deploy apps at scale means cross platform development tools will only become more and more important over the coming years.
Here is a list of surefire tools we can use for cross-platform app development:
PhoneGap/PhoneGap Build -- a free product from Adobe largely based on Apache Cordova
IBM Worklight -- a modified version of Apache Cordova with additional features to support IBM-specific tools through APIs built into the product
Xamarin -- used to build cross-platform apps with C#