Think: plasma and ion weaponry, "lasers" of sorts.  The energy density can be adjusted to cause temporary paralysis ("stun") or to emulsify tissue and organs ("kill").  Explosives still contain the contemporary fragmentation, smoke, and flash grenades, but also include plasma grenades, EMP explosives (can disrupt ship's systems without destroying the hardware), and things of that nature.  Really, it's up to you how advanced you want to make it.  But, projectiles weapons would be archaic at this point.  Energy weapons are the normal.