libmicrohttpd : A small C library that makes it easy to run an HTTP server as part of another application. ( http://gnunet.org/libmicrohttpd/ )
opal : C++ class library normalising numerous telephony protocols ( http://www.opalvoip.org/ )
ptlib : Network focused portable C++ class library providing high level functions ( http://www.opalvoip.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a zugaina
For Paludis use this rsync : rsync://gentoo.zugaina.org/zugaina-portage
If you have a problem : ycarus(-at-)zugaina.org