As of 6/5/19, there are:

6 Pistols
17 Rifles
17 SMGs
9 LMGs
11 Snipers
5 Shotguns
+ the shovel, crossbow, and wonder weapons.

All non-wonder weapons are located on each map, with wall weapons differing on all maps.

Groesten Haus is one of the two launch maps located in the game, and is rewarded to players after completing one of The Final Reich's 2 easter eggs (it may have been unlocked for everyone, I am unsure of this).
The map is based off of the prologue of the mode, and takes place in a single house.

Weapons available:

MP40 - 1000 Jolts - Wallbuy on first floor or in the mystery box.
STG44 - 1000/1500 Jolts - Wallbuy on the first floor or in the mystery box.
Combat Shotgun - 1000 Jolts - Wallbuy on the second floor or in the mystery box.

Mystery Box - 1000 Jolts - Located on the second floor in a secret room accessible through a short easter egg.

No wonder weapons are available on the map.

The Final Reich is the second of the launch maps, and acts as the standard zombies map with quests and such. The map is available from the start.

Weapons:

Machine Pistol - 500 Jolts - Wallbuy in the spawn room.
M30 Luftwaffe Drilling - 500 Jolts - Wallbuy in the spawn room.
Type 100 - 750/1000 Jolts - Wallbuy in the Village Square or in the mystery box.
SVT-40 - 750/1000 Jolts - Wallbuy in the Village Square or in the mystery box.
M1928 - 1000 Jolts - Wallbuy in the Riverside or in the mystery box.
Lee Enfield - 1000/1600 Jolts - Wallbuy in the Courtyard or in the mystery box.
Combat Shotgun - 1000 Jolts - Wallbuy in the Pub or in the mystery box.
Waffe 28 - 1000 Jolts - Wallbuy at the Tower or in the mystery box.
M1 Garand -1000/1250 Jolts - Wallbuy in the Command Center or in the mystery box.
Grease Gun - 1000 Jolts - Wallbuy in the Command Center or in the mystery box.
M1941 - 1000/1500 Jolts - Wallbuy in the Labs or in the mystery box.
BAR - 1000/1500 Jolts - Wallbuy in the Morgue or in the mystery box.
STG44 - 1000/1500 Jolts - Wallbuy in the Morgue or in the mystery box.
MP40 - 1000 Jolts - Wallbuy in the Sewers or in the mystery box.
PPSH41 - 1000 Jolts - Wallbuy in the Sewers or in the mystery box.
FG42 - 1000/1500 Jolts - Wallbuy in the Salt Mines or in the mystery box.

Special Weapons -

Tesla Gun - Electrical Gun used to stun enemies and kill in one shot easily in earlier rounds. Has 4 elemental upgrades: The Midnight, Bloodthirst, Reaper, and Hurricane.

Midnight - Tesla Gun Upgrade. Fires a orb of green energy forward, dealing infinite damage and penetrating through all foes. Good to use when a full train is behind you. After firing, you can run inside of the orb to be protected from enemies. Will not instakill wustlings or brenners.

Bloodthirst - Tesla Gun Upgrade. When fired at a zombie, the zombie will lock in place with red energy flowing through it. After a few seconds, the zombie will explode and kill nearby zombies. Can hit multiple targets and deals infinite damage. Will not instakill wustlings or brenners.

Reaper - Tesla Gun Upgrade. When fired at zombies, they will attack nearby zombies before exploding in a small radius, killing more zombies with infinite damage. Will not instakill wustlings or brenners.

Hurricane - Tesla Gun Upgrade. When fired, a large, slow, blue orb of electricity will shoot forward, killing zombies with infinite damage. Similar to midnight, but has less ammo, travels slower, and has a wider range. Can sit on the ground for a few seconds to kill zombies. Will not instakill wustlings or brenners.
The 4 varients are also located in The Tortured Path, Bodega Cervantes, USS Mount Olympus, and Altar of Blood.

Red Talon - A Melee Weapon that one shots until the mid 20s.

The Classic - A version of the PPSH-41 that closely resembles the version in CoD WaW. Has increased damage, fire rate, and ammo capacity. Located in the box after a short quest. Also located on the Frozen Dawn.

Box Locations -

Command Center (Starting location), The Tower, and The Courtyard.

The Darkest Shore is the first DLC map added to CoD WW2, included with the Resistance DLC pack.

Weapons available:

Machine Pistol - 500 Jolts - Wallbuy on the Beach
M1A1 Carbine - 500/1000 Jolts - Wallbuy on the Beach or in the mystery box.
Sawed Off Shotgun - 500 Jolts - Wallbuy in the Beach Passage.
Type 100 - 750/1000 Jolts - Wallbuy in the Bluffs or in the mystery box.
SVT-40 - 750/1000 Jolts - Wallbuy in the Bluffs or in the mystery box.
Waffe 28 - 1000 Jolts - Wallbuy in the Bluffs or in the mystery box.
Combat Shotgun - 1000 Jolts - Wallbuy in the Bunkers or in the mystery box.
M1 Garand - 1000/1250 Jolts - Wallbuy in the Bunkers or in the mystery box.
STG44 - 1000/1500 Jolts - Wallbuy in the Overlook or in the mystery box.
M1941 - 1000/1500 Jolts - Wallbuy in the Overlook or in the mystery box.
FG42 - 1000/1600 Jolts - Wallbuy in the Artillery Bunker or in the mystery box.
BAR - 1000/1500 Jolts - Wallbuy in the Artillery Bunker or in the mystery box.
Lee Enfield - 1000/1600 Jolts - Wallbuy in Bunker 1 or in the mystery box.
MP40 - 1000 Jolts - Wallbuy in Bunker 3 or in the mystery box.
Grease Gun - 1000 Jolts - Wallbuy in Bunker 3 or in the mystery box.
M1928 - 1000 Jolts - Wallbuy in the U-Boat Pens or in the mystery box.
PPSH-41 - 1000 Jolts - Wallbuy in the Mines or in the mystery box.

Special Weapons:

Ripsaw - 2500 Jolts - Located in the U-Boat Pens after built. A very powerful melee weapons with a charged dash attack dealing infinite damage. Standard swing only lasts until round ~20.

Ripsaw (upgraded) - 500/3000 Jolts - Located in the U-Boat Pens after getting a charged zombie spine and filling it with souls. 500 for an upgrade, 3000 to buy with the regular version not equipped. Adds the ability to shoot, getting rid of the infinite damage charge.

R.I.P. Saw - 5000 Jolts - Upgraded version of the Ripsaw after a quest. Adds damage and more ammo.

Pommel of Barbarossa - Obtained at the end of the main quest. Fills the Tactical Grenade slot. When thrown, created an energy bubble to slow down zombies and explodes after a few seconds. Has a 15 second recharge before restoring in your inventory.

Box Locations:

Overlook (Starting Location), Beach, Bluffs, Bunker 3.

The Shadowed Throne is the second DLC map, and was released with the War Machine DLC Pack.

Weapons Available:

Shovel - Free - Located in the Underbelly if you want to replace one of your special melee weapons.
Kar98k - 500 Jolts - Wallbuy in the Underbelly.
Sawed-Off Shotgun - 500 Jolts - Wallbuy in the Underbelly.
Type 100 - 750/1000 Jolts - Wallbuy in the Apartments or in the mystery box.
SVT-40 - 750/1000 Jolts - Wallbuy in the Apartments or in the mystery box.
Reichsrevolver - 500/1000 Jolts - Wallbuy in the Destroyed Building or in the mystery box.
Waffe 28 - 1000 Jolts - Wallbuy in the Destroyed Building or in the mystery box.
MP40 - 1000 Jolts - Wallbuy in the Main Street, the Zeppelin, or in the mystery box.
Baseball Bat - Free - Located in the Main Street; has a long range melee swing.
M1928 - 1000/1250 Jolts - Wallbuy in the Cabaret or in the mystery box.
STG44 - 1000/1500 Jolts - Wallbuy in the Cabaret or in the mystery box.
Lee Enfield - 1000/1600 Jolts - Wallbuy in the Cabaret or in the mystery box.
Trench Knife - Free - Located in the Cabaret; Has a quick melee attack.
PPSH-41 - 1000 Jolts - Wallbuy in the Museum or in the mystery box.
Combat Shotgun - 1000 Jolts - Wallbuy in the Museum or in the mystery box.
M1 Garand - 1000/1250 Jolts - Wallbuy in the Museum or in the mystery box.
Ice Pick - Free - Located in the Museum; has a fast charging attack.
BAR - 1000/1500 Jolts - Wallbuy in the Plaza or in the mystery box.
M1941 - 1000/1500 Jolts - Wallbuy in the Plaza or in the mystery box.
FG42 - 1000/1600 Jolts - Wallbuy in the Church, the Zeppelin, or in the mystery box.
Grease Gun - 1000 Jolts - Wallbuy in Barbarossa's Refuge or in the mystery box.

Special Weapons -

Tesla Gun - Free - Obtained through hangman easter egg.
Ripsaw - Free - Obtained through hangman easter egg.
Wunderbuss - Free - Obtained by building it in the Apartments. Has a percentage meter for ammo, which can be refilled by firing a different type of shot at zombies, so basically infinite ammo. Decent damage and will kill things eventually. Poor choice for Wustlings.
Nachtmahr - Free - Upgraded baseball bat through the Easter Egg. Shoots a ball of energy when using the special attack.
Percha - Free - Upgraded trench knife through the Easter Egg. Restores health or armor through an execution attack.
Holda - Free - Upgraded ice pick through the Easter Egg. Acts the same as the Ice pick, with the charge attack.
Blade of Barbarossa - Free - Upgraded Melee Weapon through the Easter Egg. Has the highest damage of all melee weapons in the map. Special attack sends out an arc of energy, killing or knocking down enemies.

The Tortured Path is a set of 3 smaller maps filled with objective rounds that came out with DLC 3, United Front.

There are no standard wall weapons on these maps, instead, Waffenboxes take their place. Waffenboxes contain a set of weapons based on their class. There are 6 of them: Starting weapons, SMGs, Rifles, LMGs, Shotguns, and Snipers.

Note: Every purchase from a Waffenbox has a chance of granting Jack in the Boxes.

Starting Weapons (500 Jolts):

1911
P-08
Machine Pistol
9mm SAP
Reichsrevolver
Enfield No. 2
SVT-40
M1A1 Carbine
M2 Carbine
Gewehr 43
Kar98k
Sawed-off Shotgun
M30 Luftwaffe Drilling

SMGs (2000 Jolts):

Grease Gun
Type 100
M1928
MP40
PPSh-41
Waffe 28
Sten
Orso
Sterling
Nambu Type 2
ZK-383
Ribeyrolles
Proto-X1
EMP44
Blyskawica
Erma EMP

Shotguns (2750 Jolts):

Combat Shotgun
Sawed-off Shotgun
M30 Luftwaffe Drilling
Toggle Action
Blunderbuss

Rifles (3000 Jolts):

M1941
M1 Garand
SVT-40
M1A1 Carbine
STG-44
FG42
BAR
Gewehr 43
Volkssturmgewehr
ITRA Burst
Type 5
M2 Carbine
AVS-36
Automaton
AS-44
NZ-41
KG M-21

Snipers (3000 Jolts):

Lee-Enfield
Kar98k
M1903
Karabin
Type 38
Lever Action
PTRS-41
De Lisle
3-Line Rifle
SDK 9mm
WZ. 25

LMGs (4250 Jolts):

Lewis
Bren
MG 15
MG42
GPMG
MG 81
Browning M1919
VMG 1927
LAD Machine Gun

Special Weapons:

Tesla Gun - Free - Randomly appearing from Supply drop after round 6.
Ripsaw (1st upgraded version) - Free - Randomly appearing from supply drop after round 6.
R.I.P. Saw - Free - Randomly appearing from supply drop after round 9.
Tesla Variants (Midnight, Bloodthirst, Hurricane, Reaper) - Free - Randomly appearing from supply drop after round 9.
Fliegerfaust - Free - Randomly appearing from supply drop after round 9.

Bodega Cervantes is a survival map based on the first chapter of the Tortured Path, Into the Storm. The map was released to everyone about when DLC 4 came out.

Weapons:
PPSh-41 - 1000 Jolts - Wallbuy or in the mystery box.
Combat Shotgun - 1000 Jolts - Wallbuy or in the mystery box.
M1 Garand - 1000/1250 Jolts - Wallbuy or in the mystery box.
BAR - 1000/1500 Jolts - Wallbuy or in the mystery box.
FG42 - 1000/1600 Jolts - Wallbuy or in the mystery box.
Lee Enfield - 1000/1600 Jolts - Wallbuy or in the mystery box.

Special Weapons:
Tesla Gun - 1000 Jotls - Mystery box.
Ripsaw - 1000 Jolts - Mystery box.
Tesla Variants - 1000 Jolts - Mystery box after round 25.

USS Mount Olympus is the second survival map that released with DLC 3, United Front. It is based on the second Tortured Path chapter, Across the Depths.

Weapons:

SVT-40 - 750/1000 Jolts - Wallbuy or in the mystery box.
Grease Gun - 1000 Jolts - Wallbuy or in the mystery box.
Waffe 28 - 1000 Jolts - Wallbuy or in the mystery box.
M1928 - 1000 Jolts - Wallbuy or in the mystery box.
MP40 - 1000 Jolts - Wallbuy or in the mystery box.
Combat Shotgun - 1000 Jolts - Wallbuy or in the mystery box.

Special Weapons:

Tesla Gun - 1000 Jolts - Mystery box.
Ripsaw - 1000 Jolts - Mystery box.
Tesla Variants - 1000 Jolts - Mystery box after round 25.

Altar of Blood is the third survival map released with DLC 3, United Front. It is based off the third chapter of the Tortured Path, Beneath the Ice.

Weapons:

Type 100 - 750/1000 Jolts - Wallbuy or in the mystery box.
M1928 - 1000 Jolts - Wallbuy or in the mystery box.
M1 Garand - 1000/1250 Jolts - Wallbuy or in the mystery box.
M1941 - 1000/1500 Jolts - Wallbuy or in the mystery box.
STG44 - 1000/1500 Jolts - Wallbuy or in the mystery box.
M1903 Springfield - 1000/2000 Jolts - Wallbuy or in the mystery box.

Special Weapons:

Tesla Gun - 1000 Jolts - Mystery box.
Ripsaw - 1000 Jolts - Mystery box.
Tesla Variants - 1000 Jolts - Mystery box after round 25.

The Frozen Dawn is the 4th and final DLC map in WW2. It was released with the Shadow War DLC pack.

Weapons:

M30 Luftwaffe Drilling - 500 Jolts - Wallbuy in the Crash Site.
Machine Pistol - 500 Jolts - Wallbuy in the Crash Site.
SVT-40 - 750/1000 Jolts - Wallbuy in the Ice Caves or in the mystery box.
Type 100 - 750/1000 Jolts - Wallbuy in the Ice Caves or in the mystery box.
MP40 - 1000 Jolts - Wallbuy in the Morgue or in the mystery box.
M1928 - 1000 Jolts - Wallbuy in the Morgue or in the mystery box.
Grease Gun - 1000 Jolts - Wallbuy in the Phylactery or in the mystery box.
FG42 - 1000/1600 Jolts - Wallbuy in the Phylactery or in the mystery box.
PPSh-41 - 1000 Jolts - Wallbuy in the Blood Altar or in the mystery box.
M1 Garand - 1000/1250 Jolts - Wallbuy in the Thulian Archives or in the mystery box.
Combat Shotgun - 1000 Jolts - Wallbuy in the Thulian Archives or in the mystery box.
STG44 - 1000/1500 Jolts - Wallbuy in the Gearworks or in the mystery box.
BAR - 1000/1500 Jolts - Wallbuy in the Overlook or in the mystery box.
Waffe 28 - 1000 Jolts - Wallbuy in the Passage or in the mystery box.
M1941 - 1000/1500 Jolts - Wallbuy in the secret area by the Overlook (accessible through Flail Teleport) or in the mystery box.
Lee Enfield - 1000/1600 Jolts - Wallbuy in the Blood Altar or in the mystery box.

Special Weapons -

Thulian Scythe (Fang of An'heist) - Powerful melee weapon with ability to slice through several enemies at once. When upgraded, the special attack shoots energy forward, killing enemies. You can also cheat death by killing a fully powered Corpse Eater and survive a fatal hit with the scythe.
Thulian Hammer (Fist of Tal'Rek) - Has ability to kill normally and do a lunge attack. When upgraded, throwing the hammer will cause it to have a boomerang affect.
Thulian Shield (Roar of Sang'Ket) - Charge attack and blast attack to kill zombies and adds protection when wielding. When upgraded, these attacks become stronger.
Thulian Flail (Talon of Lu'Roth) - Standard attack adds health or armor like the Perchta. Secondly, it has a teleport effect by throwing the Orb of Lu'Roth, and when upgraded, this can also be used to possess zombies.

Many weapons in WW2 Zombies have an extra effect when upgraded. Many of them make the gun more powerful, or give it a different niche than other weapons.


Pistols:

PO-8 - Turns into a 4 round burst
1911 - Turns into a dual wield grenade launcher with no splash damage to player.
Machine Pistol - None
9mm SAP - Turns into a shotgun blast
Reichsrevolver - none
Enfield No. 2 - none

Rifles:

M1 Garand - Becomes a 2 round burst
SVT-40 - Fully Auto
STG44 - None
FG-42 - None
BAR - None
M1941 - None
M1A1 - Full Auto
Gewehr 43 - None
Volkssturmgewehr - None
Type 5 - None
M2 Carbine - None
AVS-36 - None
Automaton - None
AS-44 - None
NZ-41 - Very high damage and upon headshot kills, can create a fiery aura around the player that stuns zombies.

SMGs

Grease Gun - None
MP-40 - None
PPSh-41 - None
M1928 - None
Type 100 - None
Waffe 28 - None
Sten - None
Orso - None
M-38 - None
Sterling - None
Nambu Type 2 - None
ZK-383 - None
Ribeyrolles - Shoots explosives in each shot. Does not deal self damage.
Proto-X1 - None
EMP44 - After reloading a full magazine (from 0 bullets), multiple Geistkraft orbs shoot out, damaging zombies upon explosion in a few seconds. Does not harm the player.

LMGs:

Bren - After reloading a full magazine, zombies that touch the player die immediately.
Lewis - Random chance for a speck to appear, which shoots zombies for a few seconds.
MG 15 - After reloading a full magazine, a dome appears to stun and kill zombies. Similar to the Pommel.
MG42 - Very high fire rate.
GPMG - Fires explosive rounds
MG 81 - Chance to freeze zombies when shooting them
Stinger - Different colored bullets will be fired, each with a different effect.
VMG 1927 - Randomly sets zombies on fire and then they explode.

Snipers:

Kar98k - None
Lee Enfield - None
Karabin - None
M1903 - None
Type 38 - occasionally zombies will explode into a burst of electricity.
Lever Action - None
PTRS-41 - None
De Lisle - Shooting a wall or the ground will create a speck which will shoot several zombies, dealing massive damage (one shots past 50)
3-Line Rifle - TBD
SDK 9MM - Shoots a shotgun effect with each pellet dealing the same damage as a sniper shot. Very powerful (highly recommend).

Shotguns:

Combat Shotgun - None
M30 Luftwaffe Drilling - Increased mag size to 3 (somehow)
Sawed Off shotgun - None
Toggle Action - None
Blunderbuss - Each shot shoots a grenade that is powerful, but does damage the player.

Others:

Fliegerfaust - None
Crossbow - Explosive bolt and has a slight monkey bomb effect.
Raven's Claw - A headshot will launch a raven which hunts down zombies and refills the mag.