Cross Platform Mobile Application Development Framework Comparision Chart

Corona	Corona lets developers use integrated Lua, layered on top of Objective-C, to build graphically rich applications that are also lightweight in size and quick in development time.	Wikipedia Link Developer Link
Phone Gap (Adobe)	The mobile framework allows web developers to natively target all smartphone with a single codebase (JavaScript, HTML and CSS) by enabling a Foreign Function Interface (FFI) to an embedded WebView or Webkit on the device.	Wikipedia Link Developer Link
Rhomobile (Motorola Solutions company)	Rhodes is a framework for building native applications that can run on a variety of smartphones. Rhodes uses a Model View Controller pattern. Views are written in HTML	Wikipedia Link Developer Link
Titanium Mobile	Appcelerator Titanium Mobile is a web based application framework solutions allowing web developers to apply existing skills to create native applications for iPhone and Android using the familiar JavaScript syntax. Developers will also have to learn the extensive Titanium API. Wikipedia notes that the term cross-compiler is misleading as the titanium engine interprets the code during run time.	Wikipedia Link Developer Link