Trigger.IO is described as 'Build native mobile apps for multiple platforms from a single HTML5 codebase. You write your HTML5 code using the Forge JavaScript API which gives you access to native features such as the camera and contacts API' and is an website in the development category. There are more than 10 alternatives to Trigger.IO, not only websites but also apps for a variety of platforms, including Android, iPhone, Windows, Mac and iPad apps. The best Trigger.IO alternative is Apache Cordova, which is both free and Open Source. Other great sites and apps similar to Trigger.IO are Appcelerator Titanium, B4X, RhoMobile and WebDGap.