dotMock (https://mock.new)

Building software that talks to other software shouldn’t be a game of "wait and hope." Developers constantly get blocked by missing or unreliable APIs; maybe the upstream service isn’t ready, maybe you don’t have credentials yet, maybe rate limits make real testing impossible. Every one of those delays burns time, breaks momentum, and forces awkward workarounds. dotMock gives teams an instant, realistic stand-in for any API so they can develop, test, and demo without depending on the real thing. It exists to remove "waiting on someone else’s system" from the development process - letting you ship faster, with fewer surprises when you finally connect to production.