A Tumblr theme is a graphics package which is preset for Tumblr blogs so that users can change their apperance according to their preferences. These themes are so flexible that they allow users to completely change the appearance of their webpage.Language, colors, typography, navigation menu, images, buttons etc., all can be of user preferences.These themes are free as well as paid.Thus free tumblr themes allow bloggers to gain complete control on their blog.Salvia, wicked, Indy, Ten Toes, Yuki, Oscar are some of the free tumblr themes.