The Free Software Foundation has published a new open-source software license aimed at developers whose code is used for software-as-a-service (SaaS) applications.
The new license allows them to guarantee that modifications to software used to power publicly available services will be contributed to the free software community.
The new license is called the GNU Affero General Public License Version 3 (GNU AGPLv3). It's based on the latest, third version of the GNU general public license (GPLv3), which was finalized in June.