Heiko Sommerfeldt Freeware Downloads
Phoner
3.23 freeware downloadSoftphone for PC-telephony using TAPI, CAPI or SIP plus answering machine
PhonerLite
2.38 freeware downloadSoftphone supporting TLS, SRTP and ZRTP as well as IPv6 and some HD codecs
PhonerLitePortable
3.16 freeware downloadEasy to use VoIP softphone with profile and contact management