The mod replaces the following items with unique models:
Amren's Family sword
Balgruuf's greatsword
Bloodthorn
Bolar's Oath blade
Borvir's dagger
Dragonbane
Grimsever
Hjalti's sword
Horksbane
Okin and Eduj
Rundi's dagger
Steel battleaxe of fiery souls
Stormfang
The Pale blade
Trollsbane
And Shield of Solitude

All mentioned items(except the shield) can be upgraded to a stronger tier in any blacksmith's forge so long as you A.) Have the original item in your inventory, B.) Have completed the associated quest, or C.) Both. Items will usually start in steel tier and will have steel weight but with dwarven damage. The same philosophy is applied to succeeding tiers, where the item will maintain the tier's weight but will have n+1 tier damage. The player also has the option of forging a non-enchanted version of the items above(though some items will never have an unenchanted version available).
Okin and Eduj, Hjalti's sword, and the Steel Battleaxe of Fiery Souls will be rusted at the start. The PC must either forge a replica, or "polish" the weapon back into steel(nothing special, just a new recipe in the blacksmith's forge).

Credits in no particular order:
Billyro - sand scorpion, scottish claymore, clara dagger, imperial broad dagger, flamberge, leaf dagger, dane axe, visc, knightly mace, fenrir blades, yggdrasil and dovah nord weapons
PraedythXVI - for porting content found in weapons collection 1 and 2, bolar's oathblade, dragon's bane, and young wolf's howl
Elisey - simple viking axe
Arnold Konrad - viking style sword
Ole Gunnar Isager - warhammer [ Diablo II ]
Artem Goyko - Young Wolf's howl
SuperiorOne - Katana
Sky_Hunter - Dragon Katana "Oni Koroshi"
Fading Signal - cubemap guides and other knowledge
Cthunsthrall - improved dragon katana textures
Shish15 - superb shield of solitude
IconicDeath - Steel and Dwarven cubemap
gUISTASSI cALAMIN - Orichalcum and Ebony cubemap