Various embodiments of systems and methods for interaction between applications built on different technologies are described herein. In one aspect, at least one action handler of a number of action handlers is associated with at least one application from a number of applications participating in the integrated scenario. In another aspect, at a first action handler that is associated with a source application, a request to access a target application is received. An identifier of the target application is retrieved and based on that identifier a second action handler associated with the target application is invoked, where the identifier of the target application is registered with the second action handler. The target application is launched by the second action handler in response to the received request.