Developer's DescriptionBy PortableAppsMake VoIP audio or video calls via open SIP protocol.MicroSIP Portable allows you to make high quality VoIP calls via open SIP protocol. You can select the best SIP provider for you. You'll get free person-to-person calls and cheap international calls. MicroSIP Portable has an easy to use interface, support for all major voice codecs, support for SIP functionality (voice, messaging, presence, video h264, and h263+) and privacy.