Other than that, for UI/manual testing I'd recommend Restfox or Bruno and ezy for gRPC. Hurl and Step CI for automated testing
Restfox: https://github.com/flawiddsouza/Restfox
Bruno: https://github.com/usebruno/bruno
ezy: https://github.com/getezy/ezy
Step CI: https://github.com/stepci/stepci
Hurl: https://github.com/Orange-OpenSource/hurl
Upd: added links