From Sword Art Online this is Kirito Sword. This is my favorite weapon in the anime and any other show or game I've played/watched.
Here's the info on the sword form Wikia
Elucidator» (エリュシデータ Eryushidēta?) is Kirito's primary sword in Sword Art Online. This sword is a demonic monster drop from boss level 50 that he wields along with «Dark Repulser». It was boosted to +40 by Lisbeth out of a maximum of 50.
Long Sword / One Hand
Handle Length: 24cm
Blade Length: 96cm
Still new to photoShop and I still need a tablet, but all in all I think I did a good Job
O and here's the original design from the books [link]
Sorry if the pick is to small
Here are other swords from Sword Art Online: