Good day,
I am unsure what you are asking, but there are free and/or Low cost schematic and PCB available. Whether or not they have libraries for the iMX is unknown to me, but you can always create your own schematic and PCB libraries for the respective design software..
For free PCB software there is Kicad for Linux and MAC and can be found here:
http://www.kicad-pcb.org/display/KICAD/KiCad+EDA+Software+Suite
As for low cost software, there seems to be a large following for Eagle:
http://www.cadsoftusa.com/shop/pricing/?language=en
and also Proteus:
http://www.labcenter.com/
Cheers,
Sam