Frappe is a batteries included web framework. It comes with many features out of the box to enable speedy development of building database applications.
It comes with various batteries out of the box. From a Configurable Admin UI with multiple views (Dashboard/Form/List/Tree), search & navigation, an Integrated Email client, REST API for all "DocTypes" (models in Frappe) to Roles & permissions, Frappe has it all.
Frappe is MIT Licensed and is hosted on GitHub. You can learn more about Frappe on the official website frappeframework.com, or learn by doing here ;)