Porcupine - It offers strong support for integration with other languages and tools.

Porcupine is an open-source Python based web application server that provides front and back-end revolutionary technologies for building Modern data-centric Web2.0 applications.After a month you will be able to write applications that you never thought were possible!Here are some facts that make Porcupine stand out from the other Web frameworks out there: Porcupine is specially designed for hosting multiple diverse Web applications using a single embedded object database. Porcupine applications adhere to the SPA (Single PaGE Application) concept. Applications are rendered and run inside a single page. No page reloading ever occurs due to the FACT that page segments are updated using Ajax. Porcupine applications are data-centric, not silo-based. This simply means that since each object type`s behaviour is bound to the object class itself, it becomes available across all other applications, ready to be leveraged by them. Thus, if application A has defined a new object type, this type including all of its exposed functionality can be re-used by your application, assuming of course that application A is already installed.