Ask HN: LightSwitch=Simple Web App in 15 minutes. Open source alternatives?

Check this video: https://www.youtube.com/watch?v=oIBJrGp-kOY

There's a simple Web OLTP RDMD based App in 15 minutes.

Which are the open source alternatives?

How much time will it take to make the same app with state-of-the-art OS tools? I mean end-to-end, from design to cloud deployment. Any experience with something similar but open source?