This control library comes with several generic converters. You can directly use them in your projects.
BoolToVisibilityConverter : Needs to receive a boolean value, will return Visibility.Visible if true, or Visibility.Collapsed if false.
BoolToVisibilityInverseConverter : The opposite of the previous converter
StringToLowerConverter, StringToUpperConverter : return the lowercase or the uppercase version of a string. Useful when you want to follow the metro guidelines for the page titles and subtitles.