* [Pact v2.1.0](https://github.com/pact-foundation/pact-ruby) – Enables consumer driven contract testing by mocking service providers and verifying interactions with expected HTTP requests and responses.

* [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.

* [Pact Broker v2.122.0](https://github.com/pact-foundation/pact_broker) – Application for sharing consumer driven contracts and verification results.

* [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.