Universe Quest aims to be ever-evolving, community driven software with gaming elements for fans of rocketry and space exploration. The goal of Universe Quest is to have all notable space exploration missions, rockets, launch sites, Solar System bodies, etc., on one place, in nice-looking interactive package. For gaming part, Universe Quest will have its own sand-boxed environment.
Universe Quest is 'work-in-progress'. However, early access version is available from the beginning of the development. If you want to become a part of Universe Quest journey, you're welcome to download Universe Quest.
Universe Quest devlog on TIGSource forums: