Backgrounds are always a great resource because a lot of designs could get a lot of life in seconds with this elements. Two things are important for that: They must be high quality and good size. So they can cover more space normally in a web site background.

In Deizguns published a great pack of abstracts backgrounds very varied. There’s twelve totally, with lights, waves, lines that fill it with life and color. The file is 5,7mb and includes twelve background in Jpg with good sizes (4000×3000 and 5000×4000 px)

They can be downloaded from Rapidshare, DepositFiles or Mediafire and are totally free for personal uses as corporative with some requirements as don’t sell them to thirds and don’t say that we created them.