Check out some AI's I did awhile back (for non-gold). Most reside at Kuat Drive Yards but some can be found on the PBW site as well as others.
StarWars Empire I (sw-emp1): Meason BLasters and CSM moving to Plasma Missiles and High Energy weapons
Y'Gathian FreeStates: Combination Organic/Crystalline weapons.
EEEvil Empire: DUC's, Ripper Beams, Wave Motion Guns, Kamakazie ships,
StarWars Empire II (sw-emp2): Meason BLasters, Wormhole Guns.
Rebels (sw-reb): Meason BLasters and Anti-matter/Quantum Torps,
Sw-Emp3 (Thrawn): Meason/Torps.
Red Gauntlets Merc Unit: DUC's, HighEnergy Discharge.
Nostropholo: Combo of Organic/Crystalline wpns.
Cephalopeian Kingdom: Psychic/Organic combo.
Also check out Atraikius's Orks, they use Torps, missiles, duc's and a host of other stuff, as well as earlier Versions of his Zorians which have almost every ship doubling as a carrier

. The Angelic Regency is also good, relying almost totally on DUC's, and the Vikings are also quite varied in their ship designs.
There are some damn fine 'different' AI's out there. The Rage just started the cycle of PPB ruling the roost. Then the Aquilaeians came along and Ionic weapons ruled the day (along with the Pyrochette). To be honest I too miss the days of facing the Krill/Jraenar/Terrans coming at me with massive missile fleets.