Aetherium Staff- Lost to the Ages Quest reward [Summon a Dwarven Sphere or Spider)

Crossbow- DG members carry it

Enchanced Crossbow- Sourine Jurard Side Quest (DG only) [50% Armor penetration]

Dwarven Crossbow- ^

Enchanced Dwarven Crossbow- ^ [50% Armor Penetration]

Zephyr Bow- Lost to the Ages Quest, Arkngthamz [Faster Draw Speed]

Auriel's Bow- DG MQ, Forgotten Vale [Extra Damage to Undead, also can block out the sun]

Dragonbone Weapon Set- Craftable

Harkon's Sword- Harkon carries it [Drains Health, Magic, and stamina IF wielded by a vampire]

Knife (1 of 5 in all of Skyrim)- Castle Volkihar (Harkon's Torture/Dinner table)

Dawnguard WarAxe- DG members carry it [Extra damage against Vamps]

Dawnguard Hammer- DG members carry it [Extra Damage against Vamps]

Dawnguard Runehammer- Florentius Side Quest (DG side only) [Bashing places a Fire Rune]

Dawnguard RuneAxe - ^ [Sun Damage which increases permanently for every undead slain]

Akaviri Sword- Carried by Dexion {Info Provided by Commando2047}, Must be Pickpocketed of of him using the Misdirection Perk

Feel Free to ask about any because i have them all

where do you get the runehammer. can you get the dwarven crossbow if im vampire?

Wouldn't mind knowing where to get some of those..

what do the knife and harkons sword look like

Florentius (DG member) gives yu a quest for it. No vamps can only get basic crossbow

How do you get these ones? Pity Harkon's sword was only a katana. I was expecting an amazing unique one. Oh well.

Knife?

katana, NICE! can you get the runehammer if you join the volkihar

Harkons Sword is a Black Katana, the Knife is the same dinner knife you find throughout the game but this one is usable as a weapon

I have updated the list with the basic locations

Moment i get home, i find the knife.

thanks drake, i am yet to get dawnguard and i wanted something like this

Dragon priest knife - Harkons room

That was in the vanilla game

They've been in since day 1.

well then this has become number 5 that almost NOBODY knew about

Look in the office outside of the east empire trading company dock thing. It's on the table on the top floor. There is also a knife and fork near the throat of the world.

Yes you can there are like 4 usable ones scattere throughout the game. Plus forks.

So is the dinner knife.

Get over it i am not adding to or removing from the list

Get over what? you little [censored]

Dinner knife OMG

Yeah since about 95% of forum goers did not even know about the knives in the vanilla game they deserved to know about this one so take it elswhere [censored]

Yeah, i see your point cause there arn't many to begin with... [censored]

Get the banjo out of your ass and move on

Please don't here you go... http://www.youtube.com/watch?v=pl2FAFwxod0