Adobe AIR (Adobe Integrated Runtime) is a cross-platform runtime system developed by Adobe Systems for building desktop applications and mobile applications, programmed using Adobe Flash, ActionScript and optionally Apache Flex. Developed by Adobe
License: Free
Adobe AIR is primarily focused on multimedia-rich desktop applications, while Appcelerator Titanium emphasizes mobile application development with strong performance. AIR offers a steeper learning curve and is proprietary, whereas Titanium provides faster development cycles and open-source options.