how can I get this colouring?

I was wondering how can I get the colouring on these icons by icons_are_hot

I also would like to know how to get this colouring (sorry I don't know who made it) and the circle effect

I know I'm asking to much but these is the last one :)
Where can I get these texture/brush with these geometric effect? (also by icons_are_hot)

uff :P
I finished :)
-> I'm using photoshop 9
THANKS IN ADVANCE!