'New Horizons' makes excellent use of the massive size and scale of Stellaris' maps by featuring a detailed recreation of the canon Star Trek galaxy, and including a surprisingly exhaustive roster of Star Trek races and factions - all of whom are playable. Because of this, it takes advantage of most of Stellaris' strengths, but it is also hamstrung by many of Stellaris' faults. 'New Horizons' is, of course, a mod for the PC game Stellaris (developed and published by Paradox). Since Birth of the Federation holds such a special place in my heart, I'm going to take a stab at reviewing 'New Horizons' and see how it compares to my personal favorite Star Trek game of all time. 'New Horizons' for Stellaris is still a work-in-progress, but it is mostly functionally complete and fairly robust. The problem is that I've yet to ever see one of these get finished.
Yes, there have been other Star Trek mods for other games in the past, and there's even some community projects to create spiritual successors to Birth of the Federation (such as Star Trek: Supremacy).
The creators seem to have been inspired by BotF.
