Specfiles is a project mainly written in ..., it's free.
CentOS specfiles
nagios-varnish-plugin-1.0.spec - nagios-varnish-plugin must be run on the varnish box locally, the patch now supports Varnish 2.0 as well as replaced strcmp with strncmp snmptt-1.3.spec - snmptt supporting both stand-alone and daemon mode