Freemium
http://dbpedia.org/page/Freemium

Shareware
http://dbpedia.org/page/Shareware

Freeware
http://dbpedia.org/page/Freeware

Donationware
http://dbpedia.org/page/Donationware

Adware
http://dbpedia.org/page/Adware

Free-to-play
http://dbpedia.org/page/Free-to-play

Careware
(No links)