Just launched by Facebook:
FBSimulatorControl, A Mac OS X library for managing, booting and interacting with multiple iOS Simulators simultaneously.
FBSimulatorControlworks by linking with the private
DVTiPhoneSimulatorRemoteClientframeworks that are present inside the Xcode bundle. Doing this allows
FBSimulatorControlto talk directly to the same APIs that Xcode and
simctldo. This, combined with launching the Simulator binaries directly, means that multiple Simulators can be launched simultaneously.
The original use-case for
FBSimulatorControlwas to boot Simulators to run End-to-End tests with