An anonymous reader writes "Starting with version 3.7, POV-Ray is released under the AGPLv3 (or later) license and thus is Free Software according to the FSF definition. 'Free software' means software that respects users' freedom and community. Roughly, the users have the freedom to run, copy, distribute, study, change and improve the software. With these freedoms, the users (both individually and collectively) control the program and what it does for them. Full source code is available, allowing users to build their own versions and for developers to incorporate portions or all of the POV-Ray source into their own software provided it is distributed under a compatible license (for example, the AGPL3 or — at their option — any later version). The POV-Ray developers also provide officially-supported binaries for selected platforms (currently only Microsoft Windows, but expected to include OS X shortly)." Update: 11/14 21:57 GMT by U L : The previous distribution terms and source modification license.