Words for Lily allows for the creation of flash card-like content for learners from approximately 5 through 15 years of age (kindergarten through middle school).
The website (wordsforlily.com) supports account holders -- typically parents of young and pre-teen children -- allowing them to create customized content for Words for Lily mobile applications (currently available on the Android market). Account holders and their children may also use the site to view their content.
User content is typically lists of words -- sight/vocabulary words for the very young -- but could be expanded to be any sort of study list. Sample content includes US States and their capitals, colors, and instruments in an orchestra.