ITS Tool is free and open source software under the GPL 3. You can modify it and redistribute it all you want, provided all changes are under the GPL. The ITS files that ship with ITS Tool may be modified and redistributed without restriction.
ITS Tool is hosted on gitorious. Clone the itstool git repository to get the latest work or to make changes yourself.
Bugs are tracked on bugs.freedesktop.org.
ITS Tool is developed primarily by Shaun McCance. If you have any questions or comments, email Shaun at email@example.com.