I made a new collection:

 http://opengameart.org/content/high-quality-2d-art-sets-wallpapers-excludet

Has anyone suggestions?

It should look like comercial grade Art... or atleast blend well with the things that are already collected.

And ofcourse it should be sets, lets say atleast 4 items (ofcourse if you find different stuff to make a set of 4 icons that would count to)