Although SWF has recently become an open format again, Adobe has not been willing to make complete source code available for free software development. The source code for the ActionScript Virtual Machine has been released as a project named Tamarin under the terms of an MPL/GPL/LGPL tri-license. It includes the specification for the ActionScript byte code format. This project is jointly managed by Mozilla and Adobe. The full specification of the SWF format is available without restriction by Adobe. The free software players Gnash and Swfdec are quite incomplete at this time. However, because SWF is now an open format, the free players should achieve higher quality going forward as developers implement the official SWF specifications.