-- [CloudVPN](http://dev.e-x-a.org/projects/cloudvpn/)
-- [FairVPN](http://minerva.netgroup.uniroma2.it/fairvpn)
-- [FreeS/WAN](http://www.freeswan.org/)
-- [GVPE](http://savannah.gnu.org/projects/gvpe/)
-- [l2tpd](http://sourceforge.net/projects/l2tpd)
+- [cjdns](https://github.com/cjdelisle/cjdns)
+- [FairVPN](https://minerva.netgroup.uniroma2.it/fairvpn)
+- [fastd](https://projects.universe-factory.net/projects/fastd/wiki)
+- [FreeLAN](https://www.freelan.org/)
+- [GVPE](http://software.schmorp.de/pkg/gvpe.html)
+- [IPOP](http://ipop-project.org/)
+- [l2tpd](https://sourceforge.net/projects/l2tpd)