Hmm... I gotta see...
FS1 (Silent Threat Version): Prometheus, Banshee, and Shield Breaker
FS2: UD-8 Kayser, Maxim, Harpoon, Trebuchet, and Helios
Outside of Freespace Universe:
Age of Empires 2 (Conquerors Version): Monk, Trebuchet, Hand Cannoneer, Paladin, Demolition Ship, Cannon Galley, Tarkan (Huns), Chu-No-Ku Crossbowmen (Chinese), and Longbowmen (Anglo-Saxon)
Tiberian Sun (Firestorm Verion): Umagon, Ghost Stalker, Mutant Hijacker, and Cyborg Reaper
Red Alert 2 (Yuri's Revenge Version): Nuclear warhead, weather control device, psychic dominator, and Slave Miner
Renegade (Never Played It): Mammoth Tank, Obelisk Chaingun, Retribution, Godsend, and Personal Ion Cannon
Empire Earth: Henry Grâce d'Adieu (Is this right?)