Swfdec is an outdated free and open-source replacement for Adobe Flash Player. It runs on Linux and FreeBSD and is distributed under the terms of the GNU Lesser General Public License (LGPL). Its last release was 0.8.4, on December 21, 2008; 16 years ago (2008-12-21) and latest in stable 0.9.2 of 2008-11-11.
Development of Swfdec has stopped. As of March 2016, the most recent commit to its Git repository was in December 2009.