EntityQ748932· pop 22· linked from 21 articlesQ748932Sign in to savefree VoIP SoftwareConnectionsLinuxEntityoperating systemEntityMicrosoft WindowsEntityAndroidEntityQ2407EntitydatabaseEntitymacOSEntityiOSEntityVoice over IPEntityQ364EntityprogrammerEntityTransmission Control ProtocolEntityValve CorporationEntityTeam Fortress 2Entityfirst-person shooterEntitysoftware licenseEntityOpenGLEntityUser Datagram ProtocolEntityQ201904Entityfree and open-source softwareEntityCategoriesFree software programmed in C++Free VoIP softwareInternet software for LinuxMacOS Internet softwareSoftware using the BSD licenseVoice over IP clients that use QtVoIP softwareWindows Internet software