@ Phoenix3000 - These are the ships which come with GWX (excluding cloned individual capital ships):
Battleships:
- US Iowa class.
- US Nevada class.
- Italian Littorio class.
- German Scharnhorst class.
Battlecruisers:
- UK Hood class (Admiral class).
Carriers:
- US Essex class.
- German Graf Zeppelin class.
Heavy Cruisers:
- Italian Zara class.
- Greek Averoff class.
- German Deutchland class pocket battleship.
Light Cruisers:
- US Brooklyn class.
- UK Southampton class.
- Italian Garibaldi class.
Destroyers:
- UK Town class.
- UK S/T class.
- UK Q/R class.
- Soviet Type 7y class.
- German Type 36A class.
Escorts and Patrol Craft:
- Axis Vorpostenboot.
- Artillary/AA Barge.
- Transport Barge.
- RAF Rescue Launch.
- Vosper class Torpedo Boat.
- Armed Tugboat.
- Japanese Type 13 Subchaser.
- Soviet Sub Chaser.
- Soviet Uragan class DE.
- German Flottenbeglieter.
- Australian and Indian Bathurst class corvette.
- Captain I and II class Frigates.
Submarines (AI Only):
- US Balao class.
- US Gato class.
- UK S-Class (US Lend-Lease subs).
- German Type IIB.
- German Type VIIC/41.
- German Milk Cow.
Passenger Vessels (Type 103):
- RMS Aquitania.
- Chatham class.
- NPTR Transport.
- Ceramic class.
Tankers (Type 101):
- Empire Celt class.
- Converted Whale Factory Ship.
Freighters (Type 102):
- NKGN Large Cargo.
- Rose Castle class.
- Belize class.
- Caribou class.
Auxiliaries (Type 100):
- NSD Submarine Depot Ship.
- NDS Depot Ship.
- Pyro class Ammunition Freighter.
- Light Ship.
Lighted Ships by Anvart:
- Hospital Ship.
- C2.
- T3.
- Coastal Merchant.
- Transport.
- Passenger Liner.
- Small Coastal Vessel.
- Tugboat.
Coastal Craft (Type 104):
- Schooner.
- Sloop.
- Large Junk.
- Small Junk.
- Deep Sea Trawler.
- Coastal Tanker.
If you want to add more ships, the following ones are available to add (although they won't have the GWX damage model, they will still work):
Battleships:
None.
Battlecruisers:
- UK Repulse (Renown class).
Carriers:
- German Seydlitz.
- US Wasp.
Heavy Cruisers:
- UK Dorchester class.
- German Lutzow.
Light Cruisers:
- German K Class.
- UK Scyllia Class AA Cruiser.
Destroyers:
- UK L&M class AA DD.
- Soviet Novak 6 class.
- French/Polish Bourrasque class.
- US Fletcher class APD (not a RL class of APD).
- UK Admiralty V&W class.
Escorts and Patrol Craft:
- Small Armed Vessel (based on Small Coastal Vessel).
- River class frigate.
Submarines (AI Only):
None. There are some playable ones around though, such as the new VIIC/41.
Passenger Vessels (Type 103):
- RMS Queen Mary.
- Chatham class hospital ship.
- Unlighted hospital ship.
- Fast Transport.
- Two funnelled transport.
Tankers (Type 101):
None.
Freighters (Type 102):
- New Empire class freighter.
- Proteus class collier.
- Cargo Steamer (three variants in one download).
Auxiliaries (Type 100):
- Japanese merchant cruiser.
- AA Auxiliary Vessel.
Lighted Ships by Anvart:
- Small Merchant.
- Small Tanker.
Coastal Craft (Type 104):
- Transport Steamer.
Being an idiot, I may have forgotten some - there seem to be so many these days.
Some of these need extra work to appear in the campaign. If you need help with that, or just with installing them, please don't hesitate to post and ask.