Notable companies in Finland include Nokia, the former market leader in mobile telephony; Stora Enso, the largest paper manufacturer in the world; Neste Oil, an oil refining and marketing company; UPM-Kymmene, the third largest paper manufacturer in the world; Aker Finnyards, the manufacturer of the world's largest cruise ships (such as Royal Caribbean's "Freedom of the Seas"); Rovio Mobile, video game developer most notable for creating Angry Birds; KONE, a manufacturer of elevators and escalators; Wärtsilä, a producer of power plants and ship engines; and Finnair, the largest Helsinki-Vantaa based international airline. Additionally, many Nordic design firms are headquartered in Finland. These include the Fiskars owned Iittala Group, Artek a furniture design firm co-created by Alvar Aalto, and Marimekko made famous by Jacqueline Kennedy Onassis. Finland has sophisticated financial markets comparable to the UK in efficiency. Though foreign investment is not as high as some other European countries, the largest foreign-headquartered companies included names such as ABB, Tellabs, Carlsberg, and Siemens.