* [Keploy v3.6.114](https://github.com/keploy/keploy) – Developer-centric API testing tool that creates tests and built-in mocks faster than unit tests.

* [Mockzilla v2.11.0](https://github.com/mockzilla/mockzilla) – OpenAPI-based mock server that generates realistic responses, validates requests, simulates latency and errors, and proxies with automatic mock fallback.

* [newman v6.2.3](https://github.com/postmanlabs/newman) – Command-line Postman collection runner for running and testing collections from terminals and CI pipelines.

* [pikopod v0.2.0](https://github.com/Pikopod/pikopod) – Spec-based sandbox that fails on purpose and replays recorded production failures to help test and fix API integration retry and webhook handling paths.