"Reactive Factions" is a mod that will make factions react to your actions if you are contributing to their enemies (basically, if you gain positive reputation with their enemies) by decreasing reputation with you (basically you get a negative reputation).
VRO overhauls the way game plays by changing the parameters of every ship, weapon, engine, shield and many other tweaks to make the game more varied, enjoyable and less player-centric and arcady.