Look for:
Logic-Level Gate Drive
Low value for RDS(on) (?), IMO I like less than .1 Ohms(100 milli ohms) (lowest possible)
Drain-Source Voltage, to be greater than your power supply
Continuous Drain Current, to be greater than your load will require
I use WinQcad no longer available.
Try Fritzing, Eagle, Kicad OR search the forums as it has been discussed here many times.
http://www.cadsoftusa.com/
http://www.kicad-pcb.org/display/KICAD/KiCad+EDA+Software+Suite