WoWDB

Here follows a list of swords with glows or effects that will override weapon enchants.
Please feel free to suggest additions or changes to the list. I would like to give credit to Töki on blizz forums for suplying a very good list of weapons.

 Azuresong Mageblade (see also newer versions from Onyxia) - White
 Blade of Diligence - Faint Blue
 Blade of the Inception - Faint Blue
 Blade of Wizardry - Fire
 Blazing Rapier - Fire
 Bloodmaw Magus-Blade - Blue
 Broken Promise - (Sheathes on the back) - Glowing Aura
 Crystalline Kopesh - Fire
 Continuum Blade - Sparkly Purple
 Fiery Prod - Fire
 Fiery Retributer (No longer Available) - Fiery
 Frostguard - Rotating Snowflakes
 Gleaming Iceblade, Yoke Slasher, Daschal's Serrated Blade - Blue
 Gleaming Quel'Serrar - Green
 Greatsword of Horrid Dreams - Transparent Edges
 Honor's Call - Blue
 Hope Ender (Sheathes on the back) - Purple
 Lydia's Sharpened Swordbreaker - Fire
 Mana Wrath - Faint Purple
 Merciless Gladiator's Slicer &  Merciless Gladiator's Quickblade - Purple
 Phosphorescent Blade - Ice
 Restored Archeus - Blue
 Saronite Spellblade - Icy Blue
 Scimitar of the Nexus-Stalkers - Purple
 Seethe - Blue
 Scimitar of the Sirocco - Yellow
 Skullforge Reaver (Sheathes on the back) - Purple
 Speedsteel Rapier - Circling Blue Spark
 Stormcaller - Ice
 The Horseman's Blade (And all its newer versions) - Fire
 The Willbreaker - Fire
 Windforged Rapier - Blue