Tomboy is an open-source desktop notetaking application for Unix-like systems written in C# using Gtk#. It uses a Wiki-like linking system to connect notes together. Tomboy is part of the GNOME desktop environment and is licensed under the GNU Lesser General Public License. Tomboy is often used for personal information management. The main principle is a notepad with a wiki-style interface. There is a main page in which the user puts all links to other pages. Words to pages that are notes automatically become hyperlinks, allowing for the management of large libraries of personal information, such as references to favorite artists that would then automatically be highlighted in e-mails containing their names.