| RFC3261 compliant SIP User-Agent library | |
| https://github.com/freeswitch/sofia-sip | |
| sofia-sip-1.13.16 | LGPL-2.1+ BSD public-domain |
| download~alpha ~amd64 ~arm ~arm64 ~ia64 ~ppc ~ppc64 sparc ~x86 ~x86-linux | gentoo |
| sofia-sip-1.13.9 | LGPL-2.1+ BSD public-domain |
| download~alpha amd64 ~arm arm64 ~ia64 ppc ~ppc64 sparc x86 ~x86-linux | gentoo |