Mockoon

Mockoon is the easiest and quickest way to run mock API servers locally. No remote deployment, no account required, free, open source and cross-platform.

Mockoon is a free and open-source developer tool allowing to quickly and easily mock APIs. It's a cross-platform desktop application which makes it enterprise friendly.
It packs a lots of features that make API mocking a breeze:
fake data generation with templating system, partial mocking with proxy mode, requests recording, OpenAPI compatibility, high performances, companion CLI for CI environments, etc

Location: Luxembourg, Luxembourg