The 'enigma2 core' is licensed under a proprietary license. The 'enigma2 core' contains all files in this sourcetree except plugins in lib/python/Plugins which carry their own LICENSE file. Those plugins are licensed under their own license. This proprietary license does not allow you to compile, modify or do anything with this sources. You are allowed, however, to distribute an unmodified version of the sources, including all license statements. Additionally, this proprietary license will essentially allow you one thing: You are free to take *THIS* version of enigma2, and derive a version which will be licensed under the GPLv2. If you're doing this, be sure to insert proper licencening statements to ensure that it doesn't get mixed up with the proprietary version. The derived version can be, of course, modified, distributed etc. in modified forms, however, you have to publish all changes you made in source form if you are distributing a binary version. Exact details can be read in the GPLv2. If you wish do send us patches to be included in the "official sourcetree", which will be based on the proprietary license, you have to agree that your code will be licensed under the proprietary license. Note that "official sourcetree" just means the version which is included in the main developer CVS hosted at, or on behalf of, Dream Multimedia TV. You are, of course, free to make patches to a GPL-only version. These changes won't show up in the "official release" then, though. Additionally, this license allows Dream Multimedia to change terms of this license. If you don't like a change in this license, you are free to derive a GPL version from a previous version, of course. The same goes for plugins. You can decide whether you want your plugins to be compatible to the "official release" (so you must explicitely allow "linking" code licensed under the proprietary license to your code), or you can decide that your code should be only linked to the GPL'ed ("free") version of enigma2. Your plugins are also allowed to be closed-source, though we strongly discourage this for technical reasons.