Here is a list of ships (and squadrons) that could be adapted into Armada from the Clone Wars, either as part of Rebel’s and Empire or in new factions. Feel free to comment additional ships to be added to the list.
Republic:
Venator class
Acclamator class
Arquitens class
Pelta class
Consular class
Stealth Ship
ARC-170
Delta-7
Actis Interceptor
Y-Wing
V-Wing
V-19
Z-95
LAAT (gunship)
Jedi shuttle
Nu-class shuttle
CIS:
Subjugator class (Malevolence)
Lucrehulk class (battleship and control ship variants)
Providence class (dreadnought and standard carrier/destroyer)
Recusant class
Munificent class
Supply ship (barbell warship)
Gozanti class
Vulture droid
Tri-fighter
Hyena bomber
Droid gunship
Nemoidian shuttle
Fanblade starfighter (Ventress)
Utapaun starfighter
C-9979 landing craft
Solar sailer
Belbullab-22 Heavy Starfighter
Edited by Battlefleet 01 Studios