*openmargin

*openmargin is an open space within a book where readers share their thoughts.

*openmargin is a mobile application that enables readers to share thoughts and insights with others. The application provides its users with a list of books and enables them to upload and share their insights and thoughts on those books with others. Books are categorized under creativity and social networking. *openmargin was launched in 2009 by Joep Kuijper, Marc Kohlbrugge, and Ruth Koppenol.