Systems and methods for integrated application platforms in accordance with embodiments of the invention are disclosed. In one embodiment, a computing device configured to execute an application platform application includes a processor, an operating system configuring the processor to create a computing environment, the application platform application at least partially natively implemented and creates an application runtime environment for cross-platform applications to execute non-natively, the application platform application including a rendering engine process configured to render pages by interpreting instructions and implement a virtual machine configured to execute instructions and an integration process that enables instructions executing within the virtual machine to launch natively implemented applications wherein the application platform application includes a pop up page file containing instructions written in the rendering language that cause the rendering engine process to render a pop up page and wherein the application platform application is configured to launch a natively implemented application.