Project Apollo - NASSP.

Project Apollo simulates the Apollo missions to Earth orbit and the Moon, and is slowly expanding to simulate planned post-Apollo missions that never flew. Project Apollo features a near-full implementation of the control panels in the Command Module and Lunar Module, and an increasingly accurate simulation of the internal systems. Also the Virtual AGC software is supported, which allows you to run precisely the same on-board guidance software as used in the real Apollo Guidance Computer.
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