In the end of 2009, iText version 5 is released under Affero GPL license. This license is drastically different from the previous license that iText had been
distributed under, in that it requires anyone using iText 5 under a free license to provide the users with the full source of their application. Projects that do not want to provide their source code are required to purchase a commercial license for a non-disclosed price or they cannot upgrade to iText 5. (Projects can continue using previous versions of iText under the more liberal license without any changes.)
- Dazu auch http://java.dzone.com/tips/java-pdf-tools-alternatives und Brunos Bemerkungen. Und alles Gute für einen Sohn.