No Whistle Phone videos yet. You could help us improve this page by suggesting one.
MicroSIP - MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack.
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Linphone - Linphone is an internet phone or Voice Over IP phone (VoIP).
Wire - Private & Secure Messenger
tSIP - tomeko.net/software: SIP client for Windows.
Zoiper - Cross-platform VoIP softphone dialer for SIP and IAX systems