About: http://dbpedia.org/resource/Category:Free_VoIP

Property	Value
rdf:type	skos:Concept
rdfs:label	Free VoIP software
skos:broader	dbpedia:Category:Free_network-related_software dbpedia:Category:VoIP_software
skos:prefLabel	Free VoIP software
is skos:subject of	dbpedia:Tapioca_(framework) dbpedia:Druid_OSE dbpedia:FreeSWITCH dbpedia:Sippy_B2BUA dbpedia:Telephone_(application) dbpedia:Ekiga dbpedia:GNU_Gatekeeper dbpedia:KCall dbpedia:SipX dbpedia:KPhone dbpedia:Twinkle_(software) dbpedia:Asterisk_(PBX) dbpedia:QuteCom dbpedia:SIP_Express_Router dbpedia:Mumble_(software) dbpedia:Linphone dbpedia:LinuxMCE dbpedia:OpenSER dbpedia:Elastix dbpedia:Minisip dbpedia:Mysipswitch dbpedia:OpenSIPS dbpedia:Sipdroid dbpedia:TrixBox

About: http://dbpedia.org/resource/Category:Free_VoIP_software