Phoner
Softphone for VoIP, CAPI und TAPI.
20 Alternatives To Phoner
3CX Phone System
3CXPhone is a free VoIP phone available for Windows, iPhone or any Android based smart phone such…
Asterisk
An open source telephony switching and private branch exchange service for Linux.
Bria
VoIP and video calling, messaging and presence - all from your computer desktop with the award-winning Bria 5 softphone client.
Ekiga
Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for…
FreeSENTRAL
FreeSentral is a full IP PBX consisting of a Linux Distribution, an IP PBX and a Web Graphical User…
Jitsi
Open-source video calling and chat platform.
LINE
LINE is a Japanese proprietary application for instant messaging on smartphones and PCs.
PhonerLite
PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).
Signal
Fast, simple & secure messaging. Privacy that fits in your pocket.
Slack
A messaging app for teams who see through the Earth!
Telephone
Telephone is a VoIP program which allows you to make phone calls over the internet.
Trillian
Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.
Wire
Private & Secure Messenger
X-Lite
The X-Lite softphone from CounterPath. Try out our fully-loaded Bria desktop client including voice and video call, messaging and presence or download X-Lite for try to test SIP softphone features.
Xabber
Open source Jabber (XMPP) client with multi-account support, clean and simple interface.
YakYak
Desktop client for Google Hangouts
Zoiper
Cross-platform VoIP softphone dialer for SIP and IAX systems
centerim
Centerim is an command line interface chat client for the common protocols like icq, msn, aim…
freepbx
FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
tSIP
tomeko.net/software: SIP client for Windows.