For reasons I can't really explain, Cargo aircrafts have a place in my heart. Don't Know if it's nice or boring to fly long time with no crew (don't know how many persons go on which flight, I guess it depends on the distance). The absence of windows makes these birds a good field for nice liveries and they tend to be more elegant than its passenger brothers.
In a quick investigation between Wikipedia, ANA website, operator's sites and other minor sources, I found eight cargo operators with regular flights to and from Lisbon. Agro air, DHL, Star Air, Swift Air, TNT, UPS, Fed Ex and TAP. From Agro Air I could not find any information. Star Air, from Denmark, operates 767-200. Spain's Swift Air operates ATR 42 from Lisbon, DHL uses a beautiful yellow 757. TAP as an agreement with Atlas Air (742 fleet, never saw any of them...) and in the past used a Royal Jordanian A310. TNT, UPS and Fed Ex I have never seen any plane, probably because I'm not an early bird...
Are there are more operators that I have failed to find? Is it possible to know their schedules? Usually these flights don't appear on the arrival/departure information boards or airport sites.