force_bind Force binding on a specific IP and/or port, change TTL/TOS/KA/MSS/REUSEADDR/FWMARK/PRIORITY. Works with both IPv4 and IPv6. Also, you can enforce bandwidth per process or per socket. See README file for examples.

Fedora installation: rpm -Uhv http://kernel.embedromix.ro/dinorepo-0.0.9-1.noarch.rpm && yum -y install force_bind
Git tree: http://kernel.embedromix.ro/us/force_bind/force_bind.git
Language is C.
License is GPLv3.
Freshmeat link: http://freshmeat.net/projects/force_bind/ RPM source (0.13)
force_bind-0.13.tar.gz README
Changelog
TODO
LICENSE